Dr. Brendan McCarthy

Craving junk food when you’re stressed isn’t a lack of discipline — it’s biology. In this episode, Dr. Brendan McCarthy breaks down what ultra-processed and hyper-palatable foods actually do inside your body — from your metabolism to your hormones, your brain, and your stress response. But this isn’t about guilt or shame. It’s about understanding what you’re up against — especially as a parent trying to make better choices in a world designed to make that difficult. You’ll learn: What ultra-processed foods really are How they impact your endocrine system and metabolism Why stress makes you crave sugar and processed foods Why shame around food doesn’t work (and never will) Simple, realistic ways to improve your family’s eating habits This episode is about taking back control — without perfection, and without guilt. Mechanism-Anchored References Monteiro, Carlos A., et al. “Ultra-Processed Foods: What They Are and How to Identify Them.” Public Health Nutrition, vol. 22, no. 5, 2019, pp. 936–941. Hall, Kevin D., et al. “Ultra-Processed Diets Cause Excess Calorie Intake and Weight Gain: An Inpatient Randomized Controlled Trial of Ad Libitum Food Intake.” Cell Metabolism, vol. 30, no. 1, 2019, pp. 67–77.e3. doi:10.1016/j.cmet.2019.05.008. Rush, E. Catherine, et al. “The Impact of Ultra-Processed Foods on Pediatric Health.” Nutrition Reviews, 2024. doi:10.1093/nutrit/nuae051. Ventura, Alison K., and John Worobey. “Early Influences on the Development of Food Preferences.” Current Biology, vol. 23, no. 9, 2013, pp. R401–R408. doi:10.1016/j.cub.2013.02.037. Mennella, Julie A., et al. “Preferences for Salty and Sweet Tastes Are Elevated and Related to Each Other during Childhood.” PLOS ONE, vol. 9, no. 3, 2014, e92201. doi:10.1371/journal.pone.0092201. Roberto, Christina A., et al. “Influence of Licensed Characters on Children’s Taste and Snack Preferences.” Pediatrics, vol. 126, no. 1, 2010, pp. 88–93. doi:10.1542/peds.2009-3433. Swindle, Taren, et al. “Pester Power: Examining Children’s Influence as an Active Component of the Family Food Environment.” Journal of Nutrition Education and Behavior, vol. 52, no. 8, 2020, pp. 801–807. doi:10.1016/j.jneb.2020.06.002. Pérez-Escamilla, Rafael, et al. “Responsive Feeding Recommendations: Harmonizing Integration into Dietary Guidelines for Infants and Young Children.” Current Developments in Nutrition, vol. 5, no. 6, 2021, nzab076. doi:10.1093/cdn/nzab076. Puhl, Rebecca M., and Chelsea A. Heuer. “Obesity Stigma: Important Considerations for Public Health.” American Journal of Public Health, vol. 100, no. 6, 2010, pp. 1019–1028. doi:10.2105/AJPH.2009.159491. World Health Organization. Set of Recommendations on the Marketing of Foods and Non-Alcoholic Beverages to Children. World Health Organization, 2010. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this episode, Dr. Brendan McCarthy—Chief Medical Officer at Protea Medical Center—dives into one of the most misunderstood topics in health: Why does it feel like you can’t stick to a diet… even when you’re trying your best? This isn’t about willpower. It’s not a character flaw. And it’s not your fault. Dr. McCarthy breaks down the biology behind stress, cravings, and weight gain—explaining how chronic stress rewires your brain, alters decision-making, and drives you toward hyper-palatable, ultra-processed foods. YouTube citations : 1. Arnsten, Amy F. T. “Stress Weakens Prefrontal Networks: Molecular Insults to Higher Cognition.” Nature Neuroscience, vol. 18, no. 10, 2015, pp. 1376–1385. Why it is here: Foundational paper for the claim that uncontrollable stress increases catecholamine signaling in the prefrontal cortex and degrades higher-order control, working memory, and inhibition. This is one of the strongest anchors for the idea that stress makes the pause smaller. 2. Schwabe, Lars, et al. “Concurrent Glucocorticoid and Noradrenergic Activity Shifts Instrumental Behavior from Goal-Directed to Habitual Control.” Journal of Neuroscience, vol. 30, no. 24, 2010, pp. 8190–8196. Why it is here: One of the most important papers for your “click-boom” model. It shows that stress chemistry can bias behavior away from goal-directed control and toward habit-like responding. That is not a morality argument. It is control architecture. 3. Plessow, Franziska, et al. “The Stressed Prefrontal Cortex and Goal-Directed Behaviour: Acute Psychosocial Stress Impairs the Flexible Implementation of Task Goals.” Experimental Brain Research, vol. 216, no. 3, 2012, pp. 397–408. Why it is here: Strong support for the claim that acute psychosocial stress impairs flexible goal implementation. Useful when you want to say that under stress, the person may still know what matters but have reduced access to that guidance in the moment. 4. Maier, Silvia U., et al. “Acute Stress Impairs Self-Control in Goal-Directed Choice by Altering Multiple Functional Connections within the Brain’s Decision Circuits.” Neuron, vol. 87, no. 3, 2015, pp. 621–631. Why it is here: Excellent for the food-choice angle. This paper supports the idea that stress increases the weight of immediately rewarding attributes and reduces self-control. In your language, the cue gets louder and the future gets quieter. 5. Epel, Elissa, et al. “Stress May Add Bite to Appetite in Women: A Laboratory Study of Stress-Induced Cortisol and Eating Behavior.” Psychoneuroendocrinology, vol. 26, no. 1, 2001, pp. 37–49. Why it is here: Classic paper, directly in women, directly in Psychoneuroendocrinology. Strong support for linking stress physiology, cortisol reactivity, and post-stress eating behavior. 6. Giddens, Emily E., et al. “The Influence of Stress on the Neural Underpinnings of Disinhibited Eating: A Systematic Review and Future Directions for Research.” Reviews in Endocrine and Metabolic Disorders, 2023. Why it is here: A modern review tying stress to food-related reward sensitivity, interoception, and cognitive control in disinhibited eating. Good bridge reference for the overall brain-food-stress model. 7. Lyu, Z., et al. “Acute Stressors Reduce Neural Inhibition to Food Cues and Increase Eating Among Binge Eating Disorder Symptomatic Women.” Frontiers in Behavioral Neuroscience, 2016. Why it is here: Helpful for the specific claim that acute stress can reduce inhibitory neural responsiveness to food cues and increase eating in vulnerable women. Strong fit for the cue-reactivity piece. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

Is weight gain really about willpower… or is something deeper going on? In this episode, Dr. Brendan McCarthy, Chief Medical Officer at Protea Medical Center, breaks down the real biology behind stress, cravings, and weight gain—and why blaming yourself (or cortisol) is missing the point. You’ll learn: Why chronic stress rewires your metabolism How stress drives cravings for ultra-processed foods The truth about cortisol and fat storage Why “just have more discipline” is bad medicine How ultra-processed foods hijack your hunger and reward systems The key to rebuilding control and agency This isn’t about motivation—it’s about understanding your biology so you can finally work with your body instead of against it. If you’ve ever felt stuck, frustrated, or blamed for your weight… this episode is for you. Mechanism-Anchored References 1. Glucocorticoids, stress, and eating Kuckuck S, van der Valk ES, Scheurink AJW, et al. Glucocorticoids, stress and eating: the mediating role of appetite-regulating hormones. Obesity Reviews. 2023. Supports the claim that stress biology and glucocorticoid signaling can alter appetite regulation and eating behavior. 2. Stress-level glucocorticoids can increase hunger Bini J, et al. Stress-level glucocorticoids increase fasting hunger and alter cerebral blood flow in neural regions that regulate food intake. 2022. Supports the claim that stress-level glucocorticoid exposure can increase hunger and affect food-intake regulation. 3. Stress-obesity link / HPA-axis context Lengton R, et al. Glucocorticoids and HPA axis regulation in the stress-obesity link. 2024. Supports the broader claim that chronic stress and glucocorticoid biology are relevant to obesity risk and metabolic dysregulation. 4. Sleep loss changes appetite and metabolism Van Cauter E, et al. Metabolic consequences of sleep and sleep loss. 2008. Supports the claim that inadequate sleep alters appetite regulation and harms carbohydrate metabolism. 5. Sleep deprivation impairs glucose handling and raises appetite pressure Knutson KL. The metabolic consequences of sleep deprivation. 2007. Supports the claim that sleep loss can worsen glucose metabolism, appetite drive, and obesity risk. 6. Circadian disruption and metabolic dysfunction Depner CM, et al. Metabolic consequences of sleep and circadian disorders. 2014. Supports the claim that circadian disruption and sleep deficiency contribute to metabolic dysregulation and weight gain risk. 7. Ultra-processed food and reward-system activation Calcaterra V, et al. Ultra-Processed Food, Reward System and Childhood Obesity. 2023. Supports the claim that ultra-processed foods interact with reward pathways in ways that can drive intake beyond simple calorie math. 8. Ultra-processed food and metabolic dysfunction Vitale M, et al. Ultra-Processed Foods and Human Health: A Systematic Review and Meta-Analysis. 2023. Supports the claim that higher UPF consumption is associated with obesity and metabolic disease risk. 9. Stress and poorer diet quality / emotional eating Shatwan IM, et al. Association between perceived stress, emotional eating, and diet quality. 2024. Supports the claim that higher perceived stress is associated with worse dietary patterns and emotional eating. 10. Compassion-based framing and adherence Sirois FM, et al. Self-Compassion and Adherence in Five Medical Samples. 2018. Supports the closing point that shame is a weak intervention model and that compassion-linked framing may better support adherence and change. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

We’ve all heard it: calories in vs. calories out. And while that’s not wrong… it’s not complete. Dr. McCarthy breaks down the three major approaches to weight loss: 1. Calorie restriction 2. Insulin management (low-carb, keto, etc.) 3. Exercise & performance …and explains why each works—but still falls short on its own. The missing piece? The signal your food sends to your body. This episode explores how ultra-processed foods: - Disrupt hunger and satiety signals - Spike blood sugar and drive cravings - Bypass normal metabolic pathways - Create instability in an otherwise well-designed system Citations: Protea Mechanism-Anchored Evidence Map Episode 4 — Insulin Is Not the Enemy: Misrouted Energy Is Below are key scientific principles and supporting literature behind this episode. This is not about “proving a point”—it’s about giving you a transparent look at how these conclusions are built. 1. Energy Balance Is Real—But Regulated Body weight isn’t controlled by calories alone. Hormones, the brain, appetite, and behavior all regulate how energy is used, stored, and burned. Key refs: Hall et al. (2012); Speakman & Westerterp (2010) 2. Insulin Is a Traffic Director, Not the Villain Insulin helps route nutrients (to muscle, liver, or fat). It doesn’t independently cause obesity—it directs where energy goes. Key refs: Saltiel & Kahn (2001); Petersen & Shulman (2018) 3. No Single Model Explains Everything Calories matter. Hormones matter. Behavior matters. A complete model integrates all three—not just one. Key refs: Ludwig et al. (2022); Hall & Chow (2015) 4. Exercise Helps—But Isn’t the Full Solution Exercise improves metabolism and health, but often doesn’t override poor dietary signaling due to compensation (hunger, adaptation). Key refs: Swift et al. (2014); Pontzer et al. (2016) 5. Food Is More Than Calories—It’s Information Food sends signals that impact hunger, metabolism, hormones, and brain reward systems—not just energy intake. Key refs: Morton et al. (2006); Friedman (2004) 6. Ultra-Processed Foods Disrupt Regulation These foods increase intake by altering satiety, speed of eating, and reward pathways—leading to overeating. Key refs: Hall et al. (2019); Monteiro et al. (2019) 7. Fructose Is Metabolized Differently Fructose is processed primarily in the liver and more readily contributes to fat production (de novo lipogenesis). Key refs: Tappy & Lê (2010); Softic et al. (2020) 8. Muscle & Protein Drive Metabolic Stability Protein supports satiety and thermogenesis, while muscle helps regulate glucose and overall metabolic health. Key refs: Leidy et al. (2015); DeFronzo et al. (2009) Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

Why do you crave dessert after dinner? Why are you hungry again an hour after eating? And why does weight sometimes seem to accelerate even when you're watching calories? In Episode 3 of this series on ultra-processed and hyper-palatable foods, Dr. Brendan McCarthy breaks down the biology behind cravings, hunger, and weight gain. This episode connects the dots between food engineering, blood sugar spikes, insulin, and the brain’s reward system—showing why this isn’t a willpower problem, but a biological response to the foods we’re eating. Dr. McCarthy, Chief Medical Officer at Protea Medical Center in Tempe, Arizona, explains how modern ultra-processed foods are designed to override normal satiety signals, destabilize blood sugar, and drive continued consumption. Over time, this can create hormonal changes that make weight gain easier and weight loss harder. In this episode you’ll learn: • Why ultra-processed foods trigger cravings and repeat eating • How glycemic spikes lead to hunger shortly after meals • The role of insulin as a “routing hormone” for calories • How food processing affects fat storage in the body • Why weight gain can accelerate over time • Why this is not a failure of willpower This series focuses on precision nutrition and endocrinology, helping you understand the real biological mechanisms behind metabolism, hunger, and weight regulation. If you’ve ever wondered why controlling food intake feels so difficult despite your best efforts, this episode will help you understand what your body is actually responding to. Citations: Episode 3 — Mechanism-Anchored Evidence Summary This episode explores how ultra-processed foods, liver metabolism, adipose tissue, hormones, and brain signaling interact to drive cravings, fat storage, and weight gain. Key mechanisms and supporting references include: Hepatic First-Pass Metabolism: Carbohydrates enter the liver via portal circulation, controlling post-meal fuel distribution (Samuel & Shulman, 2016). Fructose and Lipogenesis: Fructose bypasses key glycolytic regulation, fueling hepatic fat synthesis (Softic et al., 2020). De Novo Lipogenesis: Excess carbs activate SREBP-1c and ChREBP, producing triglycerides in the liver (Donnelly et al., 2005). VLDL Export: Hepatic triglycerides are packaged into VLDL and sent to adipose tissue (Adiels et al., 2008). Adipose Storage: Lipoprotein lipase delivers circulating triglycerides to fat cells (Kersten, 2014). Insulin Resistance: Hepatic lipid accumulation impairs insulin signaling (Samuel et al., 2004). Hyperinsulinemia & Fat Storage: Insulin promotes triglyceride storage and suppresses lipolysis (Czech, 2017). Aromatase & Estrone: Expanded adipose increases aromatase activity, raising estrone levels (Simpson et al., 1999; Key et al., 2002). Inflammation: Enlarged fat cells release cytokines, worsening insulin resistance (Hotamisligil, 2006). Ultra-Processed Foods & Overeating: Highly palatable foods drive excess calorie intake (Hall et al., 2019). Reward Signaling: Dopamine pathways reinforce eating behaviors (Volkow et al., 2013). Satiety Disruption: Low fiber and processed structure bypass satiety hormones like GLP-1 and PYY (Slavin & Green, 2007). Synthesis: Ultra-processed foods → rapid hepatic load → lipogenesis → triglyceride export → adipose expansion → estrone increase → inflammation & insulin resistance → cravings and repeated consumption. This creates a self-reinforcing metabolic cycle linking diet, liver, adipose tissue, hormones, and behavior. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this episode, we’re diving deep into ultra-processed foods — and why cravings in your 30s, 40s, and 50s are not a character flaw. If you’ve ever: Felt compulsive around certain foods Wondered why you “used to have more willpower” Eaten for stress relief and felt ashamed afterward Asked yourself why your partner can stop but you can’t This episode is for you. There are three major biologic reasons why cravings intensify during this season of life: 1️⃣ Engineered hyper-palatable foods Modern ultra-processed foods are scientifically designed to manipulate salt, sugar, fat, texture, and glycemic response — overriding normal satiety signals and strengthening dopamine tagging in the brain. 2️⃣ Chronic stress physiology Stress amplifies cravings for energy-dense foods. These foods temporarily shift serotonin and dopamine signaling, creating relief — but worsening the long-term cycle. 3️⃣ Perimenopause & progesterone decline As ovarian reserve shifts in your late 30s and beyond, progesterone drops. Less allopregnanolone support at the GABA receptor means higher anxiety tone — and weaker “brakes” on impulse control. This isn’t about willpower. It was never a fair fight. Citation: Episode 2 – Mechanism-Anchored Evidence Map: Ultra-Processed Foods, Reward Signaling, Stress, and Hormonal Vulnerability Ultra-Processed Food Engineering – Salt, sugar, fat, and texture are manipulated to maximize reward signaling and overconsumption. (Fazzino et al., 2019; Gearhardt et al., 2011; Hall et al., 2019) Dopamine and Reward Tagging – Dopamine marks important stimuli, reinforcing repeated behavior and “wanting” rather than pleasure. (Schultz, 2016; Berridge & Robinson, 1998) High-Glycemic Carbohydrates – Increase tryptophan availability and serotonin synthesis, influencing mood and short-term relief. (Fernstrom & Wurtman, 1972; Wurtman & Wurtman, 1989) Chronic Stress – Alters reward circuitry, increasing vulnerability to compulsive behaviors. (Piazza & Le Moal, 1998; Sinha, 2008) Progesterone, Allopregnanolone, and GABA – Hormonal neurosteroids modulate GABAergic inhibition, stress buffering, and reward sensitivity. (Paul & Purdy, 1992; Reddy, 2010; Purdy et al., 1990) Sleep and Appetite Regulation – Hormonal and neurosteroid pathways influence sleep; sleep disruption increases hunger and cravings. (Tasali et al., 2004; Purdy et al., 1990) Summary: These mechanisms explain why hyper-stimulating foods are particularly compelling during chronic stress and hormonal transitions, showing cravings are biologically reinforced rather than a matter of willpower. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

If you're a woman in your late 30s, 40s, or 50s and you feel swollen, inflamed, stuck, exhausted, or like your body has completely turned against you — this series is for you. Let’s be clear: This is NOT a diet episode. This is NOT food shaming. This is NOT about willpower. This is upstream endocrinology. In this episode, Dr. McCarthy explains: Why weight gain in perimenopause is not a discipline problem How estrogen dominance and low progesterone shift insulin sensitivity Why stress hormones (like cortisol) amplify fat storage How ultra-processed, hyper-palatable foods hijack your brain Why traditional diets (keto, low-fat, carnivore) often fail women The real role of insulin as a routing hormone — not just a blood sugar hormone Why GLP-1 medications can help — but shouldn’t become “handcuffs” Most nutrition research was built on male physiology. You are not a small man. And it was never a fair fight. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this final episode of the Progesterone Promise series, Dr. Brendan McCarthy, Chief Medical Officer of Protea Medical Center, breaks down one of the most misunderstood hormones in women’s health: progesterone. Progesterone is not “good” or “bad.” It’s contextual. In today’s world of quick sound bites and social media medicine, hormones are often reduced to oversimplified claims like “progesterone fixes anxiety” or “progesterone causes breast cancer.” The truth? It depends on your body, your stress levels, your liver health, your inflammation, your delivery method, and whether you're using bioidentical progesterone or synthetic progestins. Citations: 1. Oral Progesterone → First-Pass Metabolism & Allopregnanolone Claim: Oral micronized progesterone undergoes significant hepatic first-pass metabolism, increasing neuroactive metabolites (especially allopregnanolone), which positively modulate GABA-A receptors and produce sedative/anxiolytic effects. Core Evidence: Simon et al., 1993; de Lignières et al., 1995; Freeman et al., 1990 — Oral progesterone produces measurable neuroactive metabolites. Paul & Purdy, 1992; Rupprecht et al., 2001 — Allopregnanolone enhances GABA-A receptor activity. Supports: Sedation variability by route • Neurosteroid generation • GABA-A modulation 2. Sulfation vs 5α-Reduction → Opposing Neurologic Effects Claim: Progesterone metabolites can produce calming (5α-reduced) or excitatory (sulfated) neurologic effects depending on enzyme routing. Core Evidence: Majewska et al., 1990 — Pregnenolone sulfate negatively modulates GABA-A. Wu et al., 1991 — Sulfated neurosteroids enhance NMDA signaling. Schumacher et al., 2007; Reddy, 2010 — Pathway reviews of sulfation vs 5α-reduction. Supports: Reverse responding hypothesis • Divergent neurologic experiences • Enzyme-dependent effects 3. Stress & Enzyme Modulation Claim: Chronic stress alters HPA axis tone and hepatic enzyme expression, influencing steroid metabolism balance. Core Evidence: McEwen, 1998 — Allostatic load model. Charmandari et al., 2005 — Cortisol’s systemic regulatory effects. Zanger & Schwab, 2013; Gibson & Skett, 2001 — Stress alters cytochrome P450 expression. Supports: Stress-biased metabolism • Context-dependent hormone response 4. Breast Tissue Signaling & Context Claim: Progesterone influences mammary differentiation and interacts with estrogen signaling in context-dependent ways. Core Evidence: Brisken & O’Malley, 2010 — Progesterone receptor biology in breast tissue. Beleut et al., 2010 — RANKL mediates progesterone-driven proliferation. Hofseth et al., 1999 — PR-ER signaling interaction. Stanczyk & Bhavnani, 2014 — Natural vs synthetic differences in breast effects. Supports: Lobuloalveolar differentiation • RANKL pathway • Context-dependent proliferation 5. Synthetic Progestins vs Bioidentical Progesterone Claim: Synthetic progestins differ structurally and bind off-target receptors, producing distinct tissue effects. Core Evidence: Stanczyk et al., 2013 — Receptor binding differences. Sitruk-Ware, 2004 — Biologic comparisons. Chlebowski et al., 2003 (WHI) — Breast cancer signal with CEE + MPA. Supports: Structural divergence • Receptor-level differences • WHI clarification 6. Route of Delivery Differences Claim: Oral, vaginal, transdermal, and sublingual progesterone produce distinct pharmacokinetic profiles and tissue targeting. Core Evidence: Simon, 1995 — Oral vs vaginal PK comparison. Cicinelli et al., 2000 — “First uterine pass effect.” Wren et al., 2003 — Route-dependent systemic levels. Supports: Uterine targeting • Neurosteroid variability • Sedation differences 7. Progesterone, PMS & Migraine Claim: Neurosteroid fluctuations influence GABAergic tone and may contribute to PMS and migraine susceptibility. Core Evidence: Backstrom et al., 2011 — Allopregnanolone fluctuations in PMS. Reddy & Rogawski, 2002 — Neurosteroids and seizure threshold. Martin & Behbehani, 2001 — Hormonal fluctuations and migraine. Supports: Luteal neurosteroid shifts • GABA instability • Migraine association Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? L

In this episode of the progesterone series, Dr. Brendan McCarthy — Chief Medical Officer of Protea Medical Center in Tempe, Arizona — explores the often misunderstood relationship between progesterone, estrogen, and breast health. For decades, women have been taught to fear their breasts and fear hormones. While awareness matters, fear is disempowering — and it has left many women confused about what’s actually happening in their bodies. In this episode, we discuss: Why breast tissue is dynamic, not static How estrogen stimulates growth and progesterone restores balance The role of progesterone in breast tissue maturation and architecture Why dense or fibrocystic breasts often reflect unopposed estrogen How restoring ovulation and progesterone can reduce breast pain and density in some women The difference between natural progesterone vs synthetic progestins Where the fear around progesterone and breast cancer really came from Progesterone is not something to fear — it is a hormone of organization, balance, and maturation. Understanding how it works allows women to approach breast health with clarity instead of anxiety. 👍 If this episode was helpful, please like, subscribe, and share it with someone who needs this information. 💬 Comments are read and appreciated. Citations: (Provided for educational purposes; this episode discusses biologic frameworks and observational data, not medical guarantees.) ⸻ Korenman SG. Estrogen window hypothesis (1980) Korenman SG. The etiology of breast cancer: hormone factors. Cancer. 1980;46(4 Suppl):874–880. Context: This paper introduced what later became known as the “estrogen window” hypothesis—the idea that prolonged estrogen-driven proliferation without adequate progesterone signaling may create periods of increased tissue vulnerability. This is a mechanistic framework, not a prevention claim, but it remains foundational in how endocrinologists think about hormonal timing and breast biology. ⸻ Estrogen as a proliferative signal in breast tissue Key TJ, Pike MC. The role of oestrogens and progestagens in the epidemiology and prevention of breast cancer. Eur J Cancer Clin Oncol. 1988;24(1):29–43. Context: Establishes estrogen’s role as a mitogenic (growth-promoting) signal in breast epithelium and frames cancer risk partly in terms of cumulative proliferative exposure over time. ⸻ Progesterone and breast differentiation biology Brisken C, O’Malley B. Hormone action in the mammary gland. Cold Spring Harb Perspect Biol. 2010;2(12):a003178. Context: Describes progesterone’s role in lobuloalveolar development, differentiation, and architectural organization in breast tissue. Supports the concept that progesterone signaling is biologically distinct from estrogen-driven proliferation. ⸻ Fibrocystic breast change and hormonal signaling Sitruk-Ware R. Hormonal replacement therapy and the breast. Menopause. 2002;9(4):237–251. Context: Reviews how different hormonal environments influence benign breast changes, including pain, nodularity, and cystic architecture, and discusses differential tissue effects of estrogen and progesterone signaling. ⸻ Mammographic density and hormonal influence Boyd NF et al. Mammographic density and the risk and detection of breast cancer. N Engl J Med. 2007;356:227–236. Context: Establishes mammographic density as a biologic and radiographic marker influenced by hormonal, stromal, and epithelial factors. Density reflects tissue composition rather than disease itself. ⸻ Bioidentical progesterone vs synthetic progestins (E3N cohort) Fournier A et al. Breast cancer risk in relation to different types of hormone replacement therapy. Int J Cancer. 2005;114(3):448–454. Context: Large observational cohort suggesting that estrogen combined with synthetic progestins was associated with higher breast cancer risk, whereas estrogen combined with micronized progesterone did not show the same risk signal. Observational data—not proof of protection. ⸻ Systematic review: progesterone vs progestins Stute P et al. The impact of micronized progesterone on breast cancer risk. Climacteric. 2018;21(2):111–122. Context: Systematic review concluding that micronized progesterone appears to have a more favorable breast safety profile compared with many synthetic progestins when used in menopausal hormone therapy. ⸻ Endocrine-disrupting compounds and estrogenic signaling Diamanti-Kandarakis E et al. Endocrine-disrupting chemicals: an Endocrine Society scientific statement. Endocr Rev. 2009;30(4):293–342. Context: Summarizes evidence that environmental compounds can exert estrogen-like signaling and disrupt normal hormonal balance, lending plausibility to concerns about prolonged estrogenic exposure without physiologic counter-regulation. ⸻ Important Clarification The research above supports discussion of biologic mechanisms, tissue behavior, and relative risk profiles. It does not establish progesterone as a guarantee against breast cancer, nor does it replace individualized s

Unexplained infertility, PMS, and low progesterone are often dismissed when labs fall “within range.” In this episode, Dr. Brendan McCarthy explains why prolactin may be the missing piece. Learn how mildly elevated prolactin can suppress ovulation, lower progesterone, and impact fertility—even when labs appear normal. We also discuss common causes, symptoms, the role of stress and medications, and why diet (including gluten sensitivity) may matter. This episode focuses on precision medicine, not fear—helping you understand what standard reference ranges often miss. Citations: Research — Prolactin and Breast Cancer Risk Below are key epidemiologic and review papers that inform the discussion in this episode regarding prolactin and breast biology. These studies look at associations, not simple cause-and-effect relationships, and help explain why prolactin shows up in breast health conversations. Meta-analysis: circulating prolactin and breast cancer risk Wang M, et al. (2016). Plasma prolactin and breast cancer risk: a meta-analysis. Cancer Causes & Control. This meta-analysis pooled data from multiple observational studies comparing women with higher versus lower circulating prolactin levels. Across studies, higher prolactin levels were associated with a modest but statistically significant increase in breast cancer risk. The association was most evident in postmenopausal women and in hormone-receptor–positive tumors. This helps explain why prolactin is considered a relevant growth signal in breast tissue rather than just a “lactation hormone.” Systematic review and meta-analysis: prolactin levels across breast cancer cohorts Aranha AF, et al. (2022). Impact of prolactin levels in breast cancer: a systematic review and meta-analysis. Endocrine-Related Cancer. This more recent systematic review and meta-analysis evaluated circulating prolactin levels across breast cancer populations and control groups. Elevated prolactin levels were associated with higher breast cancer occurrence, with stronger associations seen in invasive cancers and hormone-receptor–positive disease. This paper adds weight to the idea that prolactin participates in breast biology in ways that matter clinically, even outside of pregnancy and breastfeeding. Prospective cohort studies: prolactin measured before diagnosis Tworoger SS, et al. (2004; 2006). Prospective analyses from large cohorts including the Nurses’ Health Study. In these studies, prolactin was measured years before any breast cancer diagnosis. Women with higher prolactin levels had a higher likelihood of developing breast cancer later, particularly estrogen-receptor–positive tumors in postmenopausal women. Because prolactin was measured before cancer developed, these studies help clarify timing and reduce the concern that elevated prolactin is simply a consequence of disease. Mechanistic context (supportive background) Experimental and translational studies show that prolactin receptor signaling influences mammary epithelial cell growth, differentiation, and interaction with estrogen signaling pathways. This provides a biologic backdrop for why epidemiologic associations between prolactin and breast cancer risk keep appearing across different study designs. How to read this as a clinician or patient These data do not mean prolactin “causes” breast cancer in a simple or deterministic way. What they do show is that prolactin is an active hormone in breast tissue, and chronically higher levels are consistently associated with changes in breast risk profiles across large populations. That’s why prolactin deserves attention in conversations about fertility, breast symptoms, and long-term hormonal signaling—not fear, and not dismissal. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this episode of our progesterone series (Episode 5), Dr. Brendan McCarthy — Chief Medical Officer of Protea Medical Center in Tempe, Arizona — breaks down the often-misunderstood relationship between stress, ovulation, progesterone, and cortisol. We explore the concept commonly referred to as the “progesterone steal” and why this term can be misleading. Rather than hormones being “stolen,” Dr. McCarthy explains how the body intelligently reroutes hormone production under stress to prioritize survival over reproduction. This episode covers: Why the body must feel safe to ovulate and produce progesterone How chronic stress impacts PMS, fertility, and cycle regularity The truth about cortisol (and why it isn’t the villain it’s often made out to be) Why low progesterone is not a personal failure or flaw Why you can’t medicate someone out of stress — and what good medicine actually looks like This conversation is about biology, not blame. Your body is not broken — it’s responding exactly as designed. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this episode, Dr. Brendan McCarthy, Chief Medical Officer of Protea Medical Center, explains why progesterone delivery systems matter—and how different routes change what progesterone actually does in the body. Part 4 of the progesterone series covers oral, topical, vaginal, rectal, injectable, and sublingual progesterone, breaking down which methods affect the brain, uterus, and breast tissue—and why choosing the right route is critical. If progesterone hasn’t worked for you in the past, the issue may not be the dose, but how it was delivered. This episode focuses on education, patient agency, and thoughtful hormone care—no shortcuts, no selling. Subscribe for more in-depth conversations on hormones and women’s health, and share with someone who may benefit. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

If progesterone makes you feel wired, anxious, angry, emotional, or unable to sleep, this episode is for you. In this deeply important continuation of our reverse responding series, Dr. Brendan McCarthy—Chief Medical Officer of Protea Medical Center—returns to clarify what was missing in Episode 3C and to walk you through the real physiology, compassion, and treatment strategy behind reverse responding. Reverse responding is not intolerance, weakness, anxiety, noncompliance, or failure. It is an adaptive response rooted in threat-state physiology, chronic stress, and lived experience. Your body is not broken—it is protecting you. In this episode, Dr. McCarthy covers: What reverse responding actually is (and what it is not) The difference between sulfation and 5-alpha pathways Why labs often miss this entirely Why “just more progesterone” makes things worse How trauma, chronic stress, and safety shape hormone response The importance of earning permission from the nervous system Practical treatment pillars: Glycemic stability Circadian safety and sleep rhythm Reducing inflammatory load Gentle nervous system regulation Slow, low, respectful progesterone onboarding Supplement strategies used clinically (and what to avoid) Most importantly, this episode is a reminder: You are not the problem. Your body is doing something intelligent. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

Dr. Brendan McCarthy, Chief Medical Officer of Protea Medical Center in Tempe, Arizona, brings closure to an important and often misunderstood topic: progesterone reverse responders. Some women take progesterone expecting calm, better sleep, and emotional balance — but instead experience anxiety, irritability, agitation, or feeling “wired but tired.” These responses are real, not imagined, and not a personal failure. In this episode, Dr. McCarthy explains: What progesterone reverse responding actually is (and what it is not) Why this reaction is not an intolerance or allergy How progesterone’s downstream metabolites affect the brain The difference between the 5-alpha reductase pathway and sulfation pathways Why labs can look “normal” while symptoms feel anything but Common mistakes providers make (pushing the dose, “waiting it out,” or masking symptoms) Why stress physiology plays a major role How thoughtful, patient-centered medicine can help women heal Most importantly, this episode emphasizes listening to women, validating lived experiences, and practicing medicine with curiosity, humility, and care. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this episode of the podcast, Dr. Brendan McCarthy—Chief Medical Officer of Protea Medical Center in Tempe, Arizona—continues his in-depth progesterone series with a deep dive into reverse responders and an often-overlooked mechanism: hormone sulfation. Many women take progesterone expecting better sleep, calmer moods, and reduced anxiety—yet feel more alert, only mildly calmer, or see no benefit at all. This episode explains why that doesn’t mean progesterone is wrong for you. Dr. McCarthy breaks down: What progesterone reverse responding really is The difference between 5-alpha reductase pathways and sulfation How the brain uses sulfation to buffer stress and trauma Why progesterone may be stored instead of calming the nervous system The role of chronic stress, PTSD, perimenopause, and hormone volatility Why higher doses can make things worse How thoughtful, low-dose, individualized hormone therapy actually works Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

Have you taken progesterone expecting calm, better sleep, or relief from PMS… only to feel more anxious, wired, or worse overall? You are not a failure—and progesterone is not failing you. Your body is responding exactly as physiology dictates. The issue is how progesterone is being delivered and metabolized. In this episode, Dr. McCarthy explains: What it means to be a progesterone reverse responder How progesterone normally supports mood and brain chemistry through allopregnanolone Why some women experience paradoxical anxiety, insomnia, or agitation The role of the 5-alpha reductase pathway in progesterone metabolism Why oral progesterone can overwhelm the brain in certain women How PCOS, topical testosterone, stress, insulin resistance, and ultra-processed diets can amplify reverse responses Why kinetics and delivery method matter just as much as dosage Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In Episode 2 of this deep-dive hormone series, Dr. Brendan McCarthy—Chief Medical Officer of Protea Medical Center in Tempe, AZ—breaks down the part of progesterone almost no one talks about: its powerful role as a brain hormone. Most women are only taught that progesterone is about fertility and uterine lining. But the truth? Progesterone is a neurosteroid that influences your amygdala, hippocampus, and prefrontal cortex—three key brain regions that shape your stress response, emotional stability, sleep, memory, and self-trust. This episode covers: ✔️ Why perimenopause makes your brain feel “out of control” ✔️ The link between progesterone decline and anxiety, irritability, depression, night sweats, and brain fog ✔️ How progesterone converts to allopregnanolone (your brain’s natural calming signal) ✔️ Why women under chronic stress or in their late 30s–40s feel symptoms more intensely ✔️ How hormonal imbalance impacts memory, decision-making, and emotional regulation ✔️ Why you’re not broken—and what real validation and proper care looks like Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In today’s episode, I’m opening the first chapter of what I believe is the most important series I’ve ever created — a deep dive into progesterone and why it became the heart of my medical practice. For more than 20 years, I’ve watched this “simple, humble hormone” transform women’s lives in ways most conventional medicine overlooks. What started in two small treatment rooms has grown into a 25,000 sq ft facility, and the core of our success comes down to understanding progesterone’s impact on the female brain, stress response, and emotional resilience. In this episode, I break down: Why progesterone is far more than a reproductive hormone How it regulates the female stress response (amygdala, hippocampus, prefrontal cortex) Why anxiety, insomnia, irritability, and emotional overwhelm often map directly to progesterone decline Why so many women feel “unraveled” in their 40s — and why it’s not their fault The science behind oral vs. sublingual progesterone (and why I use troches) How conventional medicine often misses the root cause The importance of physicians showing their work, their data, and their citations The lived stories and clinical outcomes that changed how I practice medicine If you’ve ever felt dismissed, unseen, or told that your anxiety or mood changes are “just stress,” this episode is for you. This is the beginning of a 7-part series where I break down the neurobiology, endocrinology, testing, dosing, delivery methods, breast health, perimenopause, and more. Citations: Brinton, Roberta Diaz, et al. “Neurosteroids and Brain Function.” Steroids, vol. 81, 2014, pp. 61–78. Epperson, C. Neill, et al. “New Insights into Perimenopausal Depression: A Neuroendocrine Vulnerability Framework.” The Lancet Psychiatry, vol. 9, no. 2, 2022, pp. 110–118. Frye, Cheryl A. “Neurosteroids—Endogenous Modulators of GABA_A Receptors.” Pharmacology & Therapeutics, vol. 116, no. 1, 2007, pp. 58–76. Genazzani, Andrea R., et al. “Progesterone, Stress, and the Brain.” Human Reproduction Update, vol. 16, no. 6, 2010, pp. 641–655. Meeker, John D., et al. “Environmental Endocrine Disruptors: Their Effects on Human Reproduction and Development.” Reproductive Toxicology, vol. 25, 2008, pp. 1–7. Mellon, Stanley H. “Neurosteroid Regulation of Central Nervous System Development.” Pharmacology & Therapeutics, vol. 116, 2007, pp. 107–124. Mizrahi, Romy, et al. “The Role of Allopregnanolone in Stress, Mood, and Trauma.” Neurobiology of Stress, vol. 11, 2019, 100198. Paul, Steven M., and Graziano Pinna. “Allopregnanolone: From Molecular Pathways to Therapeutic Applications.” Current Opinion in Neurobiology, vol. 48, 2018, pp. 90–96. Pluchino, Nicoletta, et al. “Progesterone and Allopregnanolone: Effects on the Central Nervous System in the Luteal Phase and in Perimenopause.” Gynecological Endocrinology, vol. 36, no. 6, 2020, pp. 441–445. Rasgon, Natalie L., et al. “Perimenopausal Changes in the Brain and Mood: A Review.” Journal of Clinical Endocrinology and Metabolism, vol. 107, no. 4, 2022, pp. 1120–1134. Reddy, Doodipala Samba. “The Neurosteroid Allopregnanolone and GABA-A Receptor Modulation in Epilepsy and Mood Disorders.” Frontiers in Neuroscience, vol. 12, 2018, 933. Schiller, Crystal E., et al. “The Neuroendocrinology of Perimenopausal Depression.” Trends in Neurosciences, vol. 44, no. 2, 2021, pp. 119–135. Schumacher, Michael, et al. “Neuroprotective Effects of Progesterone and Its Metabolites.” Frontiers in Neuroendocrinology, vol. 33, 2012, pp. 415–439. Selye, Hans. “The General Adaptation Syndrome and the Diseases of Adaptation.” Journal of Clinical Endocrinology, vol. 6, no. 2, 1946, pp. 117–230. Sheng, Jun, and György Buzsáki. “Neuronal Firing and Theta Oscillations in the Amygdala During Fear Conditioning.” Neuron, vol. 53, 2007, pp. 653–667. Smith, Sheryl S. “Progesterone Withdrawal Increases Neuronal Excitability in the Hippocampus: A GABA_A Mechanism.” Journal of Neuroscience, vol. 28, 2008, pp. 10171–10179. Snyder, Jonathan S., et al. “Adult Hippocampal Neurogenesis and Stress Regulation.” Nature Reviews Neuroscience, vol. 12, 2011, pp. 1–9. Stanczyk, Frank Z., and Jerilynn C. Prior. “Progesterone and Progestins: A Review of Pharmacology, PK, and Clinical Use.” Steroids, vol. 82, 2014, pp. 1–8. Tu, Ming-Je, et al. “Oral, Vaginal, and Transdermal Progesterone: PK, Metabolism, and Tissue Distribution.” Drug Metabolism Reviews, vol. 52, no. 2, 2020, pp. 1–28. Wang, Jun, et al. “Stress, Amygdala Plasticity, and the Neuroendocrine Interface.” Nature Neuroscience, vol. 10, 2007, pp. 1093–1100. Weinstock, Marta. “The Hippocampus and Chronic Stress.” Neurochemical Research, vol. 42, 2017, pp. 1–12. World Health Organization. Progesterone and Reproductive Function: Clinical Perspectives. WHO, 2019. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical

Join Dr. Brendan McCarthy, Chief Medical Officer at Protea Medical Center in Tempe, Arizona, for a deep, practical breakdown of estrone—one of the most misunderstood and under-tested hormones in women’s health. In this episode, Dr. McCarthy explains: Why estrone matters far more than most routine labs suggest How estrone relates to inflammation, insulin resistance, body fat, and chronic disease What your estrone actually tells you about your metabolic load How phase 1 and phase 2 liver detox pathways determine whether estrogen becomes helpful or harmful How to use food, supplements, and prescriptions appropriately based on your labs Red flags to watch for with boutique labs, overpriced clinics, and “hormone hacks” You’ll learn exactly how clinicians should evaluate estrone, how to interpret the estrone–estradiol ratio, and how to identify where estrogen metabolism is blocked so you can take meaningful steps toward better health. If you find this helpful, please subscribe and share it with someone who wants real, evidence-based hormone education. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this episode, Dr. Brendan McCarthy, Chief Medical Officer at Protea Medical Center in Tempe, Arizona, takes you deep into the science of Estrone metabolism, why it becomes dominant during perimenopause and menopause, and the exact lab tests that uncover real root causes of symptoms like weight gain, mood swings, breast tenderness, irritability, fatigue, and sleep disruption. This is Part 4 of our Estrone Series — and today’s focus is the real, science-based pathways behind estrone dominance: Estrone : Estradiol ratios 2-, 4-, and 16-hydroxyestrone pathways COMT function and methylation Liver health and detoxification capacity The nutrients and lifestyle factors that shift estrogen metabolism How to interpret patterns your regular doctor may overlook If you’ve ever been dismissed, told your symptoms are “normal,” or felt like something is wrong that no one is addressing — this episode gives you the tools, the labs, and the language to advocate for your health. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In Part 3 of the Forgotten Estrogen series, Dr. Brendan McCarthy—Chief Medical Officer of Protea Medical Center in Tempe, Arizona—dives deep into the misunderstood relationship between estrone and cancer. For decades, women have been told to fear estrogen. But is estrogen really the enemy—or is it the environment within the body that determines risk? Dr. McCarthy explains: How estrone functions after menopause Why estrogen became wrongly vilified after the 2002 Nurse’s Health Study The truth about inflammation, insulin resistance, and detox pathways The role of methylation, glutathione, and liver detox in estrogen metabolism What lab markers actually matter (and how to interpret them) Practical ways to support your hormones through nutrition, sleep, and lifestyle This episode is about empowerment through knowledge, not fear. If you’ve ever been confused or afraid of estrogen, this conversation will change how you understand your body and your hormones. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this episode — Part 2 of our Estrone Series — Dr. McCarthy takes a deeper dive into estrone, the often misunderstood and overlooked estrogen. Learn: Why estrone isn’t the “bad” estrogen it’s made out to be How body fat, inflammation, and lifestyle influence estrone levels The connection between estrone, insulin resistance, and breast health Why oral estrogen can worsen symptoms for some women Natural ways to support estrogen balance, including diet, nutrients, and detox pathways Dr. McCarthy explains how understanding estrone can empower women through perimenopause and menopause — and why context and comprehensive lab work matter more than quick fixes. 💬 Have questions about estrone or hormone balance? Drop them in the comments — your feedback helps shape future episodes! Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this episode, Dr. Brendan McCarthy, Chief Medical Officer of Protea Medical Center, dives deep into estrone, one of the three key estrogens, and explains why understanding it is crucial for women’s health. Learn about: The differences between estradiol, estriol, and estrone How estrone levels shift during perimenopause and menopause Why oral estrogen can dramatically increase estrone The impact of lifestyle factors like diet, body fat, stress, alcohol, and sedentary behavior on estrogen balance Practical tips to support healthy estrogen metabolism naturally Dr. McCarthy breaks down complex biochemistry in a clear, actionable way so you can take charge of your hormonal health. Citations: 1. Bulun, Serdar E., et al. “Aromatase and Estrogen Biosynthesis in Adipose Tissue.” Endocrine Reviews, vol. 23, no. 3, 2002, pp. 305–342. 2. Labrie, Fernand, et al. “Importance of the Intracrinology of Estrogen Synthesis in Peripheral Tissues in Postmenopausal Women.” Journal of Steroid Biochemistry and Molecular Biology, vol. 118, nos. 4–5, 2010, pp. 273–279. 3. Sasano, Hironobu, and Toshihiko Harada. “Differential Expression of Aromatase and 17β-Hydroxysteroid Dehydrogenase Isoenzymes in Human Tissues.” Journal of Steroid Biochemistry and Molecular Biology, vol. 86, no. 3–5, 2003, pp. 327–333. 4. Yager, James D., and Nancy E. Davidson. “Estrogen Carcinogenesis in Breast Cancer.” New England Journal of Medicine, vol. 354, no. 3, 2006, pp. 270–282. 5. Cavalieri, Ercole L., and Eleanor G. Rogan. “Depurinating Estrogen-DNA Adducts, Mechanisms of Formation, and Prevention.” Clinical Cancer Research, vol. 16, no. 3, 2010, pp. 596–602. 6. Suba, Zsuzsanna. “Circulating Estrogens and Estrogen Metabolism in Obese Women.” Journal of Clinical Endocrinology and Metabolism, vol. 98, no. 11, 2013, pp. 4336–4344. 7. Simpson, Evan R., and Konstanze C. Pike. “Aromatase Expression in Adipose Tissue: Relationship to Obesity and Insulin Resistance.” Endocrinology, vol. 156, no. 9, 2015, pp. 3422–3435. 8. Key, Timothy J., et al. “Circulating Sex Hormones and Breast Cancer Risk Factors in Postmenopausal Women: Reanalysis of 13 Studies.” British Journal of Cancer, vol. 105, no. 5, 2011, pp. 709–722. 9. Stanczyk, Frank Z., et al. “Oral, Transdermal and Injectable Hormone Therapy: Pharmacokinetics and Effects on Estrone/Estradiol Ratios.” Menopause, vol. 24, no. 9, 2017, pp. 1080–1090. 10. Santen, Richard J., et al. “Estrogen Bioidentical Hormone Therapy: Route of Administration and Risk.” Journal of Clinical Endocrinology and Metabolism, vol. 105, no. 7, 2020, pp. 2062–2074. 11. Zeleniuch-Jacquotte, Anne, et al. “Postmenopausal Levels of Estrone, Estradiol, and Estrone Sulfate and Breast Cancer Risk.” Cancer Epidemiology, Biomarkers & Prevention, vol. 23, no. 8, 2014, pp. 1531–1539. 12. Dall, Gabriella V., and Christine L. Clarke. “Local Estrogen Biosynthesis and Signaling in Breast Cancer Progression.” Steroids, vol. 78, no. 7, 2013, pp. 639–646. 13. Heald, Anthony H., et al. “Relationships Between Serum Estrone, Insulin Resistance, and Adiposity in Postmenopausal Women.” Clinical Endocrinology, vol. 67, no. 3, 2007, pp. 340–345. 14. Kuiper, George G. J. M., et al. “Estrogen Receptor β Selectivity of Estriol and Implications for Tissue-Specific Effects.” PNAS, vol. 94, no. 17, 1997, pp. 9105–9110. 15. Michnovicz, Joseph J., et al. “Dietary Indoles and Estrogen Metabolism: Effects of Cruciferous Vegetable Intake.” Journal of Nutrition, vol. 134, no. 12, 2004, pp. 3479S– Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this heartfelt episode, Dr. Brendan McCarthy dives deep into why women are turning away from conventional medicine and seeking care in alternative spaces. He explores the growing Make America Healthy Again (MAHA) and Make America Medical Again (MAMA) movements, sharing his perspective as a naturopathic medical doctor trained in both conventional and integrative medicine. Dr. McCarthy discusses empathy in healthcare, accountability to patients, and the importance of bridging the gap between modern medicine and natural approaches. This episode is an honest look at what real medicine should feel like—human, compassionate, and deeply connected. 🔹 Topics Covered: Why women are leaving conventional medicine The rise of MAHA and MAMA movements How empathy and validation heal where prescriptions can’t Building accountability and integrity in patient care Bridging the divide between natural and conventional medicine Citations: https://drive.google.com/file/d/1R7oRXvuVDl5pW-pGXtfXXs0Ue3L11whZ/view?usp=sharing Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this powerful episode, Dr. McCarthy continues his “Make America Healthy Again” series — exploring how conventional medicine has failed women through dismissal, invalidation, and profit-driven care. He discusses why so many women are turning to online influencers and alternative medicine for answers, and how we can begin to reconcile modern medicine with true, compassionate healthcare. 👉 Topics covered: The systemic dismissal of women’s symptoms How short medical visits and profit models harm patients The rise of “Make America Healthy Again” culture The dangers of influencer-driven supplement marketing Why reconciliation between women and medicine is essential 🎧 A thoughtful, research-backed conversation that challenges the system — and advocates for women’s health, time, and trust. Citations: https://drive.google.com/file/d/1AygX2JSGLMyDrQt5WW6v3Xk4m1lhPblE/view Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this episode, I dive deep into “Mama vs. Maha” — the Make America Medical Again movement versus the Make America Healthy Again movement — and explore how both emerged from a broken medical system. We’ll trace how modern medicine drifted from its original purpose, focusing more on economics than empathy, and how that shift has profoundly impacted women’s health over the past 60 years. From the “Valium era” to SSRIs and Ambien, I break down how systemic neglect, profit motives, and regulatory failures alienated women from traditional care — and what it will take to restore trust. This episode is personal, reflective, and at times somber — but it’s an important conversation about accountability, reconciliation, and rebuilding the heart of medicine. References: https://drive.google.com/file/d/1mQKU7VpiT5KhXCFFLYtdVoWFAjKRi16J/view?usp=sharing Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

Join Dr. Brendan McCarthy, as he dives into Part 2 of our series on understanding the divide in modern medicine. In this episode, Dr. McCarthy explores: How education, corporate influence, and lobbying have shaped medicine and nutrition advice The history and impact of the food pyramid and dietary guidelines Why trust in traditional medicine has eroded and how alternative approaches gained popularity The role of pharmaceutical advertising and conference influence on medical practice Steps to rebuild trust and prioritize patient-centered care Dr. McCarthy emphasizes accountability, understanding science objectively, and always keeping the patient’s well-being at the center of care. 📌 Citation / References: Steinman, Michael A., and Jerome P. Kassirer. “Is Continuing Medical Education a Drug-Promotion Tool? YES.” Canadian Family Physician, vol. 53, no. 10, 2007, pp. 1650–1652. PMC, https://pmc.ncbi.nlm.nih.gov/articles/PMC2231419. ⸻ 2. Bowman, Marjorie A., and David L. Pearle. “Changes in Drug Prescribing Patterns Related to Commercial Company Funding of Continuing Medical Education.” Journal of Continuing Education in the Health Professions, vol. 8, no. 1, 1988, pp. 13–20. Lippincott Williams & Wilkins, https://journals.lww.com/jcehp/fulltext/1988/08010/changes_in_drug_prescribing_patterns_related_to.3.aspx. ⸻ 3. Bowman, Marjorie A., and David L. Pearle. “Industry-Sponsored Grand Rounds and Prescribing Behavior.” Journal of the American Medical Association, vol. 283, no. 3, 2000, pp. 373–380. ResearchGate, https://www.researchgate.net/publication/12077958_Industry-Sponsored_Grand_Rounds_and_Prescribing_Behavior. ⸻ 4. Fickweiler, Frederike, Udo Fickweiler, and Klaus Urbach. “Interactions between Physicians and the Pharmaceutical Industry Generally and Sales Representatives Specifically and Their Association with Physicians’ Attitudes and Prescribing Habits: A Systematic Review.” BMJ Open, vol. 7, no. 9, 2017, e016408. BMJ Publishing Group, https://bmjopen.bmj.com/content/7/9/e016408. ⸻ 5. Fugh-Berman, Adriane. “May I Have the Sting? Cutting CME’s Ties to Pharma.” AMA Journal of Ethics, vol. 8, no. 6, 2006, pp. 356–360. American Medical Association, https://journalofethics.ama-assn.org/article/may-sting-bit-cutting-cmes-ties-pharma/2006-06 Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this episode, Dr. Brendan McCarthy, Chief Medical Officer of Protea Medical Center, opens up about why so many patients lose trust in traditional, insurance-based medical care—and why they often turn exclusively to alternative medicine. Dr. McCarthy shares personal experiences and patient stories that reveal the deeper issues in today’s healthcare system: short appointment times, lack of empathy, profit-driven models, and the powerful role of storytelling in alternative health. This conversation is about more than medicine—it’s about empathy, validation, and radical transparency in how we care for one another. In this episode you’ll learn: Why patients often reject pharmaceuticals (even when safe & effective) The role of empathy and time in building trust How alternative medicine wins hearts through stories Why managed care models fail both patients and providers How we can rebuild trust in healthcare through radical transparency Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this episode, I open up about my personal journey into medicine, how my son’s health crisis during medical school shaped the doctor I am today, and why I believe in practicing medicine with time, care, and accountability. As a licensed naturopathic medical doctor and primary care provider, I share how I balance conventional treatments with holistic approaches, and why I think medicine needs both science and humanity. You’ll hear: The personal story that drove me to become the kind of doctor I am today Why I spend extra time with patients and focus on building trust The strengths and challenges of both conventional and alternative medicine How patients can learn who to trust in today’s confusing healthcare world Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this powerful series finale, Dr. Brendan McCarthy, Chief Medical Officer of Protea Medical Center, shares a personal story about the humble beginnings of his practice—and then dives deep into a critical but often overlooked topic in medicine: self-silencing in women and how it profoundly impacts health. In this episode, you'll learn: How emotional suppression and chronic stress affect weight gain, fertility, autoimmunity, and thyroid function Why simply telling women to “eat less” or “relax” is not real medicine—and what actually works The role of intermittent fasting, hormonal support, and therapy in restoring health How to identify self-silencing behaviors and start healing from the inside out A discussion of GLP-1s, LDN, cold plunges, testosterone, thyroid labs, and more A call for modern medicine to return to true, whole-person care Whether you're a patient, physician, or just curious about the future of compassionate medicine—this one’s for you. Citations: https://academic.oup.com/mend/article/15/11/1864/2747880 https://www.frontiersin.org/journals/genetics/articles/10.3389/fgene.2012.00177/full Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

Why do so many women struggle with autoimmune issues, fertility challenges, cardiovascular disease, and weight gain—despite following medical advice? In this episode, Dr. Brendan McCarthy, NMD, explores the overlooked connection between self-silencing—the habit of suppressing your voice, needs, and emotions—and women’s health. Drawing on years of patient care and research, he explains how chronic stress from silencing yourself impacts the body at a biochemical level, and what you can do about it. You’ll learn: ✔️ How self-silencing triggers stress pathways that worsen inflammation and disease ✔️ Why heart rate variability is a powerful tool for tracking stress ✔️ Simple, science-backed therapies—from cold plunging to nutrition to breathing techniques ✔️ How physicians can address both the cause and the symptoms of stress-related illness ✔️ What treatments may help stabilize autoimmunity, cardiovascular risk, and fertility issues This episode wraps up Dr. McCarthy’s series on self-silencing and offers practical strategies to support healing while doing the deeper inner work. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this episode, Dr. Brendan McCarthy, Chief Medical Officer at Protea Medical Center in Tempe, Arizona, explores how self-silencing—the cultural pressure for women to suppress their voices and needs—can directly affect fertility. Dr. McCarthy discusses: The emotional toll of self-silencing on women’s identity and value How chronic stress impacts ovulation, progesterone, and conception Why the medical system often overlooks stress as a factor in infertility A more compassionate, integrative approach to fertility care This episode is part of a larger series on self-silencing and women’s health. If you’ve struggled with fertility or felt unheard in medical settings, this conversation offers insight and hope. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

Why do so many women struggle with stress-related health issues without ever speaking up? In this episode, Dr. Brendan McCarthy continues his series on self-silencing in women—a powerful yet often overlooked cultural and psychological pattern. Dr. McCarthy breaks down: What “self-silencing” really means and how it shows up in everyday life The four categories of self-silencing How chronic stress and emotional suppression affect hormones, fertility, and cardiovascular health Why women face higher risks of heart disease when these patterns go unaddressed What men can do to better support their partners during PMS, perimenopause, and menopause This conversation is about more than symptoms—it’s about validation, advocacy, and the urgent need to recognize how cultural conditioning impacts women’s health. Citations: Jack, D. C., & Dill, D. (1992). The Silencing the Self Scale: Schemas of intimacy associated with depression in women. Psychology of Women Quarterly, 16(1), 97–106. • Jack, D. C. (1999). Silencing the self: Inner dialogues and outer realities. Harvard University Press. • Jack, D. C. (2011). Reflections on the silencing the self scale and its origins. Psychology of Women Quarterly, 35(3), 523–529. • Jakubowski, K. P., Barinas-Mitchell, E., et al. (2022). The cardiovascular cost of silence: Self-silencing and carotid atherosclerosis. Annals of Behavioral Medicine, 56(3), 282–293. • Ussher, J. M. (2004). Premenstrual syndrome and self-policing. Social Theory & Health, 2(1), 56–77. • Ussher, J. M. (2013). Diagnosing difficult women. Feminism & Psychology, 23(1), 63–77. • Beauboeuf-Lafontant, T. (2008). Listening past the lies. Qualitative Sociology, 31(2), 105–124. • Rozanski, A. (2014). Behavioral cardiology. Circulation, 129(25), 2509–2516. 1. Jack & Dill (1992) – Developed Silencing the Self Scale. Linked to depression and poor health outcomes. 2. Framingham Offspring Study (Jack, 2011) – Women with high self-silencing had ↑ heart disease and premature death. 3. Jakubowski et al. (2022, Annals of Behavioral Medicine) – Self-silencing predicted ↑ carotid atherosclerosis in midlife women. 4. Beauboeuf-Lafontant (2008, Qualitative Sociology) – Black women’s depression tied to silencing under cultural expectations of strength. 5. Ussher (2004, 2013, 2023) – Purity/self-policing associated with self-blame and somatic illness pathways. 6. Rasmussen (2014) – Self-silencing linked to anger suppression, leading to somatic symptoms. 7. Peterson (2015) – Shame and silence in purity narratives obstruct preventive health care. 8. CRP & Stress Studies – High CRP consistently linked to psychosocial stress (Rozanski, 2014, Circulation). Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In this episode, Dr. Brendan McCarthy explores how self-silencing behaviors—putting others first, suppressing your own needs, and avoiding conflict—can contribute to chronic stress and trigger autoimmune conditions in women. From the science of immune misfires to the cultural pressures women face, Dr. McCarthy shares how deep, patient-centered care goes beyond prescriptions to address the root causes of illness. He discusses the link between trauma, vagal tone, hormone balance, inflammation, and lifestyle habits—and why breaking the self-silencing cycle can be a powerful step toward healing. If you’ve been told “your labs look fine” but you still don’t feel well, this conversation will help you understand why. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

Welcome to the first episode in a five-part series on self-silencing and its profound effect on women’s health. I’m Dr. Brendan McCarthy, Chief Medical Officer at Protea Medical Center, and in this episode, I break down how self-silencing — the learned suppression of one’s needs, emotions, and voice — directly influences weight gain, hormone disruption, autoimmunity, cardiovascular risk, and more. This is a deeply personal and evidence-backed conversation rooted in decades of clinical experience and medical research. I discuss real patient patterns, the emotional layers behind common health complaints, and why this silent epidemic deserves more space in medicine. If you or someone you love has ever struggled with feeling unheard, unseen, or overwhelmed by caretaking roles, this is for you. Citations: 13] Jakubowski, K. P., Barinas-Mitchell, E., Chang, Y.-F., Maki, P. M., Matthews, K. A., & Thurston, R. C. (2021). The Cardiovascular Cost of Silence: Relationships Between Self-silencing and Carotid Atherosclerosis in Midlife Women. *Annals of Behavioral Medicine, 56*(3), 282–290. DOI: 10.1093/abm/kaab046 [27] Eyal, M. (2023, October 3). Self-Silencing Is Making Women Sick. *TIME*. [5] Jack, D. C. (2010, March 29). Silencing the Self Theory. *OUPblog*. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

In today’s episode, we’re talking about the role men play in fertility and women’s health. Too often, the fertility journey places the burden entirely on women, physically, emotionally, and medically. Dr. McCarthy unpacks why that’s both inaccurate and damaging, and shares what true masculinity looks like during this chapter: support, presence, and courage. From hormone imbalances and sperm health to the overlooked emotional toll men face, this episode is a candid call for men to stay in the room—with their partners and with themselves. 🔍 Topics covered: Why the fertility industry fails couples The emotional withdrawal reflex many men experience Microplastics, testosterone, and sperm quality What lab work men should request The truth about aging and male fertility Real steps to support your partner and reclaim your role Whether you're navigating fertility, supporting someone who is, or simply want to be a better partner, this episode offers insight and grounded advice. Dr. Brendan McCarthy is the founder and Chief Medical Officer of Protea Medical Center in Arizona. With over two decades of experience, he’s helped thousands of patients navigate hormonal imbalances using bioidentical HRT, nutrition, and root-cause medicine. He’s also taught and mentored other physicians on integrative approaches to hormone therapy, weight loss, fertility, and more. If you’re ready to take your health seriously, this podcast is a great place to start. 👇 Tap Subscribe to learn more about what’s actually happening in your body, and what to do about it. 📘 Read Dr. McCarthy’s Book: Jump Off the Mood Swing – A Sane Woman’s Guide to Her Crazy Hormones https://www.amazon.com/Jump-Off-Mood-Swing-Hormones/dp/0999649604 📲 Follow Dr. McCarthy: Instagram: @drbrendanmccarthy TikTok: @drbrendanmccarthy Website: www.protealife.com 💬 Got a question or topic for a future episode? Let us know in the comments!

Welcome to the podcast with Dr. Brendan McCarthy! In this episode, Dr. McCarthy opens up about the psychological hurdles men face when it comes to reproductive health, how avoidance can create deep relationship wounds, and why it's critical for male partners to step into fertility conversations with courage and compassion. He breaks down: ✔️ The emotional weight women carry in fertility journeys ✔️ How low testosterone and sperm count influence male behavior ✔️ Why fertility has been unfairly framed as a “women’s issue” ✔️ The connection between masculinity and fertility shame ✔️ What men can do TODAY to show up differently Whether you're a woman looking for tools to help your partner understand the burden you carry, or a man ready to take ownership of your role in this shared journey, this episode offers insight, validation, and hope. 💻 Learn more at https://protealife.com Dr. Brendan McCarthy founded Protea Medical Center in 2002. While he’s been the chief medical officer, Protea has grown and evolved into a dynamic medical center serving the Valley and Central Arizona. A nationally recognized as an expert in hormone replacement therapy, Dr McCarthy s the only instructor in the nation who teaches BioHRT on live patients. Physicians travel to Arizona to take his course and integrate it into their own practices. Besides hormone replacement therapy, Dr. McCarthy has spoken nationally and locally before physicians on topics such as weight loss, infertility, nutritional therapy and more. Thank you for tuning in and don't forget to hit that SUBSCRIBE button! Let us know in the COMMENTS if you have any questions or what you may want Dr. McCarthy to talk about next! Check out Dr. Brendan McCarthy's Book! https://www.amazon.com/Jump-Off-Mood-... -More Links- Instagram: www.instagram.com/drbrendanmccarthy TikTok: www.tiktok.com/drbrendanmccarthy Clinic Website: www.protealife.com

Welcome to the podcast with Dr. Brendan McCarthy! PMS isn’t just a hormone issue—it affects relationships too. In this episode, Dr. McCarthy breaks down how hormone shifts impact emotions, communication, and connection. It’s a message for men who want to understand what’s really going on—and how to show up better. 💡 Topics: Why PMS can trigger relationship tension The science behind progesterone and mood How self-silencing builds resentment What actually helps (and what doesn’t) If this episode helps, share it with someone who needs to hear it. 💻 Learn more at https://protealife.com Dr. Brendan McCarthy founded Protea Medical Center in 2002. While he’s been the chief medical officer, Protea has grown and evolved into a dynamic medical center serving the Valley and Central Arizona. A nationally recognized as an expert in hormone replacement therapy, Dr McCarthy s the only instructor in the nation who teaches BioHRT on live patients. Physicians travel to Arizona to take his course and integrate it into their own practices. Besides hormone replacement therapy, Dr. McCarthy has spoken nationally and locally before physicians on topics such as weight loss, infertility, nutritional therapy and more. Thank you for tuning in and don't forget to hit that SUBSCRIBE button! Let us know in the COMMENTS if you have any questions or what you may want Dr. McCarthy to talk about next! Check out Dr. Brendan McCarthy's Book! https://www.amazon.com/Jump-Off-Mood-... -More Links- Instagram: www.instagram.com/drbrendanmccarthy TikTok: www.tiktok.com/drbrendanmccarthy Clinic Website: www.protealife.com

Welcome to the podcast with Dr. Brendan McCarthy! Today he continues answering your most pressing questions about testosterone and hormone therapy in Part 2 of our Testosterone Q&A series. In this episode, Dr. McCarthy dives into: Why your labs can look "normal" while you still feel terrible The difference between DHEA and actual testosterone therapy The role of sex hormone-binding globulin (SHBG) in blocking free testosterone The impact of chronic stress on hormone balance Why testosterone creams might not be effective for everyone How estrogen levels affect bone density and hormone optimization 🧬 Featuring insights backed by clinical experience and scientific literature, including: 🔬 Citations Zhu, Z., Zhao, J., Fang, Y. et al. (2021). Association between serum estradiol level, sex hormone binding globulin level, and bone mineral density in middle-aged postmenopausal women. J Orthop Surg Res 16, 648. https://doi.org/10.1186/s13018-021-02799-3 Reginster, J.Y., et al. (1992). Minimal levels of serum estradiol prevent postmenopausal bone loss. Calcif Tissue Int, 51(5), 340–343. https://doi.org/10.1007/BF00316876 💻 Learn more at https://protealife.com Dr. Brendan McCarthy founded Protea Medical Center in 2002. While he’s been the chief medical officer, Protea has grown and evolved into a dynamic medical center serving the Valley and Central Arizona. A nationally recognized as an expert in hormone replacement therapy, Dr McCarthy s the only instructor in the nation who teaches BioHRT on live patients. Physicians travel to Arizona to take his course and integrate it into their own practices. Besides hormone replacement therapy, Dr. McCarthy has spoken nationally and locally before physicians on topics such as weight loss, infertility, nutritional therapy and more. Thank you for tuning in and don't forget to hit that SUBSCRIBE button! Let us know in the COMMENTS if you have any questions or what you may want Dr. McCarthy to talk about next! Check out Dr. Brendan McCarthy's Book! https://www.amazon.com/Jump-Off-Mood-... -More Links- Instagram: www.instagram.com/drbrendanmccarthy TikTok: www.tiktok.com/drbrendanmccarthy Clinic Website: www.protealife.com

Welcome to the podcast with Dr. Brendan McCarthy! In this episode, I’ll be responding to your questions and comments. As always, thank you for being part of this community. Your questions fuel these episodes — and I’m honored to keep showing up for you. 🧪 Have questions about your labs? Drop them in the comments — I may cover them in the next episode. 💬 Yes, I do read them (even in movie previews). Dr. Brendan McCarthy founded Protea Medical Center in 2002. While he’s been the chief medical officer, Protea has grown and evolved into a dynamic medical center serving the Valley and Central Arizona. A nationally recognized as an expert in hormone replacement therapy, Dr McCarthy s the only instructor in the nation who teaches BioHRT on live patients. Physicians travel to Arizona to take his course and integrate it into their own practices. Besides hormone replacement therapy, Dr. McCarthy has spoken nationally and locally before physicians on topics such as weight loss, infertility, nutritional therapy and more. Thank you for tuning in and don't forget to hit that SUBSCRIBE button! Let us know in the COMMENTS if you have any questions or what you may want Dr. McCarthy to talk about next! Check out Dr. Brendan McCarthy's Book! https://www.amazon.com/Jump-Off-Mood-... -More Links- Instagram: www.instagram.com/drbrendanmccarthy TikTok: www.tiktok.com/drbrendanmccarthy Clinic Website: www.protealife.com

Welcome to the podcast with Dr. Brendan McCarthy! In this episode, he dives deep into the powerful potential, and the necessary precautions, of testosterone replacement therapy (TRT) in women. He shares why this once-taboo treatment is gaining traction, how it may reduce the risk of breast cancer by up to 50%, and why lab testing and clinical nuance are absolutely non-negotiable. Dr. McCarthy also addresses medical betrayal, the rise of influencer-driven misinformation, and what it means to receive care rooted in science, safety, and trust. If you've ever been confused, dismissed, or overwhelmed by hormone therapy conversations, this one’s for you. 🧬 Topics covered: TRT’s anti-proliferative effects on breast tissue The importance of lab work and metabolite monitoring DHT, estradiol, and aromatization explained The ethical issues around "lab-free" prescribing Why nuance matters more than ever in women’s hormone care Citation: https://drive.google.com/file/d/11EPfPIotgAeCTr69wHGvErBNafGUipF5/view?usp=sharing Dr. Brendan McCarthy founded Protea Medical Center in 2002. While he’s been the chief medical officer, Protea has grown and evolved into a dynamic medical center serving the Valley and Central Arizona. A nationally recognized as an expert in hormone replacement therapy, Dr McCarthy s the only instructor in the nation who teaches BioHRT on live patients. Physicians travel to Arizona to take his course and integrate it into their own practices. Besides hormone replacement therapy, Dr. McCarthy has spoken nationally and locally before physicians on topics such as weight loss, infertility, nutritional therapy and more. Thank you for tuning in and don't forget to hit that SUBSCRIBE button! Let us know in the COMMENTS if you have any questions or what you may want Dr. McCarthy to talk about next! Check out Dr. Brendan McCarthy's Book! https://www.amazon.com/Jump-Off-Mood-... -More Links- Instagram: www.instagram.com/drbrendanmccarthy TikTok: www.tiktok.com/drbrendanmccarthy Clinic Website: www.protealife.com

Welcome to the podcast with Dr. Brendan McCarthy! In this deeply personal episode, he shares why lab work—especially testing FSH (Follicle Stimulating Hormone)—is non-negotiable in hormone replacement therapy. This is not about gatekeeping. It’s about understanding. It’s about caring. Dr. McCarthy recounts a formative memory of meeting a woman who underwent surgical menopause and was never told what would happen to her body afterward. That moment shaped his lifelong mission to treat women with comprehensive, individualized care—not cookie-cutter patches or “blind firing” estrogen without context. In this episode, he explains: 🧬 Why FSH matters just as much as estrogen 🧠 How FSH affects metabolism, bone density, fat storage, and even Alzheimer’s risk 🩺 What truly responsible hormone therapy should look like 💬 And how we must challenge trends in medicine that ignore the full picture Citations: Mao L, Wang L, Bennett S, Xu J, Zou J. Effects of follicle-stimulating hormone on fat metabolism and cognitive impairment in women during menopause. Front Physiol. 2022 Dec 5;13:1043237. doi: 10.3389/fphys.2022.1043237. PMID: 36545281; PMCID: PMC9760686. Spicer J, Malaspina D, Blank SV, Goosens KA. Follicle-stimulating hormone: More than a marker for menopause: FSH as a frontier for women's mental health. Psychiatry Res. 2025 Mar;345:116239. doi: 10.1016/j.psychres.2024.116239. Epub 2024 Oct 28. PMID: 39892305; PMCID: PMC12094525. Sponton CH, Kajimura S. Burning Fat and Building Bone by FSH Blockade. Cell Metab. 2017 Aug 1;26(2):285-287. doi: 10.1016/j.cmet.2017.07.018. PMID: 28768167; PMCID: PMC9142816 Dr. Brendan McCarthy founded Protea Medical Center in 2002. While he’s been the chief medical officer, Protea has grown and evolved into a dynamic medical center serving the Valley and Central Arizona. A nationally recognized as an expert in hormone replacement therapy, Dr McCarthy is the only instructor in the nation who teaches BioHRT on live patients. Physicians travel to Arizona to take his course and integrate it into their own practices. Besides hormone replacement therapy, Dr. McCarthy has spoken nationally and locally before physicians on topics such as weight loss, infertility, nutritional therapy and more. Dr. Brendan McCarthy founded Protea Medical Center in 2002. While he’s been the chief medical officer, Protea has grown and evolved into a dynamic medical center serving the Valley and Central Arizona. A nationally recognized as an expert in hormone replacement therapy, Dr McCarthy s the only instructor in the nation who teaches BioHRT on live patients. Physicians travel to Arizona to take his course and integrate it into their own practices. Besides hormone replacement therapy, Dr. McCarthy has spoken nationally and locally before physicians on topics such as weight loss, infertility, nutritional therapy and more. Thank you for tuning in and don't forget to hit that SUBSCRIBE button! Let us know in the COMMENTS if you have any questions or what you may want Dr. McCarthy to talk about next! Check out Dr. Brendan McCarthy's Book! https://www.amazon.com/Jump-Off-Mood-... -More Links- Instagram: www.instagram.com/drbrendanmccarthy TikTok: www.tiktok.com/drbrendanmccarthy Clinic Website: www.protealife.com

Welcome to the podcast with Dr. Brendan McCarthy! In this video, Dr. Brendan McCarthy breaks down common misconceptions about hormone testing and treatment during perimenopause — including why many influencers and physicians get it wrong. From the misuse of expensive boutique tests like the Dutch test, to the dangers of suppressive hormone therapies without proper lab monitoring, Dr. McCarthy explains the science behind hormone fluctuations, why labs do provide valuable insights, and the importance of individualized care. Learn why ignoring hormone labs isn’t just lazy — it’s harmful — and how true, affordable care should prioritize your unique hormonal balance, not profits. If you’re navigating perimenopause, this video offers critical clarity on your options and what you truly deserve from your healthcare provider. Dr. Brendan McCarthy founded Protea Medical Center in 2002. While he’s been the chief medical officer, Protea has grown and evolved into a dynamic medical center serving the Valley and Central Arizona. A nationally recognized as an expert in hormone replacement therapy, Dr McCarthy s the only instructor in the nation who teaches BioHRT on live patients. Physicians travel to Arizona to take his course and integrate it into their own practices. Besides hormone replacement therapy, Dr. McCarthy has spoken nationally and locally before physicians on topics such as weight loss, infertility, nutritional therapy and more. Thank you for tuning in and don't forget to hit that SUBSCRIBE button! Let us know in the COMMENTS if you have any questions or what you may want Dr. McCarthy to talk about next! Check out Dr. Brendan McCarthy's Book! https://www.amazon.com/Jump-Off-Mood-... -More Links- Instagram: www.instagram.com/drbrendanmccarthy TikTok: www.tiktok.com/drbrendanmccarthy Clinic Website: www.protealife.com

Welcome to the podcast with Dr. Brendan McCarthy! Can you start hormone replacement therapy (HRT) or bioidentical hormones without lab testing? Technically—yes. But should you? In this episode, Dr. Brendan McCarthy, Chief Medical Officer of Protea Medical Center, shares his medical perspective on why skipping labs could put your health at risk. Responding to viral videos that suggest lab work is unnecessary, Dr. McCarthy walks you through: ✅ Why objective data matters—especially for hormone care ✅ The dangers of prescribing hormones without testing ✅ How HRT can be safely and affordably customized ✅ Real-life clinical scenarios that show the power of lab-guided treatment Whether you're navigating perimenopause, menopause, or curious about functional medicine, this episode aims to inform—not attack—and to elevate the standard of care all patients deserve. Dr. Brendan McCarthy founded Protea Medical Center in 2002. While he’s been the chief medical officer, Protea has grown and evolved into a dynamic medical center serving the Valley and Central Arizona. A nationally recognized as an expert in hormone replacement therapy, Dr McCarthy s the only instructor in the nation who teaches BioHRT on live patients. Physicians travel to Arizona to take his course and integrate it into their own practices. Besides hormone replacement therapy, Dr. McCarthy has spoken nationally and locally before physicians on topics such as weight loss, infertility, nutritional therapy and more. Citations: - O'Connell, Mary Beth. "Pharmacokinetic and pharmacologic variation between different estrogen products." The Journal of Clinical Pharmacology 35.9S (1995): 18S-24S.. - Qureshi, Rehana, et al. "The major pre-and postmenopausal estrogens play opposing roles in obesity-driven mammary inflammation and breast cancer development." Cell metabolism 31.6 (2020): 1154-1172.. - Bagot CN, Marsh MS, Whitehead M, Sherwood R, Roberts L, Patel RK, Arya R. The effect of estrone on thrombin generation may explain the different thrombotic risk between oral and transdermal hormone replacement therapy. J Thromb Haemost. 2010 Aug;8(8):1736-44. doi: 10.1111/j.1538-7836.2010.03953.x. Epub 2010 Jun 14. PMID: Thank you for tuning in and don't forget to hit that SUBSCRIBE button! Let us know in the COMMENTS if you have any questions or what you may want Dr. McCarthy to talk about next! Check out Dr. Brendan McCarthy's Book! https://www.amazon.com/Jump-Off-Mood-... -More Links- Instagram: www.instagram.com/drbrendanmccarthy TikTok: www.tiktok.com/drbrendanmccarthy Clinic Website: www.protealife.com

Welcome to the podcast with Dr. Brendan McCarthy! This episode takes you deep into the real-world practice of prescribing testosterone therapy for women. This is not a high-level overview—this is a nuts and bolts breakdown: ✅ Who it's for ✅ How it's dosed ✅ What labs to run ✅ What delivery methods are safest ✅ Why it's often done wrong—and how to get it right With over 20 years of clinical experience, Dr. McCarthy shares the insights no seminar or textbook can offer, including the emotional and psychological challenges women face when beginning testosterone therapy, and the very real fears around side effects and community stigma. 📌 Whether you’re a patient looking for answers, or a clinician wanting to deepen your knowledge, this episode is for you. Dr. Brendan McCarthy founded Protea Medical Center in 2002. While he’s been the chief medical officer, Protea has grown and evolved into a dynamic medical center serving the Valley and Central Arizona. A nationally recognized as an expert in hormone replacement therapy, Dr McCarthy s the only instructor in the nation who teaches BioHRT on live patients. Physicians travel to Arizona to take his course and integrate it into their own practices. Besides hormone replacement therapy, Dr. McCarthy has spoken nationally and locally before physicians on topics such as weight loss, infertility, nutritional therapy and more. Citations: Popma, Arne, et al. "Cortisol moderates the relationship between testosterone and aggression in delinquent male adolescents." Biological psychiatry 61.3 (2007): 405-411 Likhtik, E., Stujenske, J. M., Topiwala, M. A., Harris, A. Z. & Gordon, J. A. Prefrontal entrainment of amygdala activity signals safety in learned fear and innate anxiety. Nat. Neurosci. 17, 106–113 (2014). Brannon, Skylar M., et al. "Exogenous testosterone increases sensitivity to moral norms in moral dilemma judgements." Nature Human Behaviour 3.8 (2019): 856-866.. M.H.M. Hutschemaekers, R.A. de Kleine, M.L. Davis, M. Kampman, J.A.J. Smits, K. Roelofs,Endogenous testosterone levels are predictive of symptom reduction with exposure therapy in social anxiety disorder,Psychoneuroendocrinology,Volume 115,2020,104612 Barel, E, Abu‐Shkara, R, Colodner, R, et al. Gonadal hormones modulate the HPA‐axis and the SNS in response to psychosocial stress. J Neuro Res. 2018; 96: 1388– 1397. https://doi.org/10.1002/jnr.24259 Buades-Rotger, M., Engelke, C., Beyer, F. et al. Endogenous testosterone is associated with lower amygdala reactivity to angry faces and reduced aggressive behavior in healthy young women. Sci Rep 6, 38538 (2016). https://doi.org/10.1038/srep38538 Ando, Sebastiano, et al. "Breast cancer: from estrogen to androgen receptor." Molecular and cellular endocrinology193.1-2 (2002): 121-128. Somboonporn, Woraluk, and Susan R. Davis. "Testosterone effects on the breast: implications for testosterone therapy for women." Endocrine reviews 25.3 (2004): 374-388. Donovitz, Gary, and Mandy Cotten. "Breast cancer incidence reduction in women treated with subcutaneous testosterone: testosterone therapy and breast cancer incidence study." European journal of breast health 17.2 (2021): 150. Glaser, Rebecca L., Anne E. York, and Constantine Dimitrakakis. "Incidence of invasive breast cancer in women treated with testosterone implants: a prospective 10-year cohort study." BMC cancer 19.1 (2019): 1271. Thank you for tuning in and don't forget to hit that SUBSCRIBE button! Let us know in the COMMENTS if you have any questions or what you may want Dr. McCarthy to talk about next! Check out Dr. Brendan McCarthy's Book! https://www.amazon.com/Jump-Off-Mood-... -More Links- Instagram: www.instagram.com/drbrendanmccarthy TikTok: www.tiktok.com/drbrendanmccarthy Clinic Website: www.protealife.com