The Dr. Layne Norton Podcast

It’s here—the last episode of Dr. Layne Norton’s no-nonsense supplement series! In this finale, Layne takes a hard, evidence-based look at some of the most overhyped supplements in fitness and bodybuilding. He cuts through the marketing claims, examines the actual research, and tells you exactly what works, what doesn’t, and who (if anyone) should actually be spending money on these products.In this episode, Layne covers:BCAAs – Do they build muscle, boost strength, or speed recovery more than just eating enough total protein?HMB – Why the “like deca” claims from the ’90s never panned out, and what it actually does (and doesn’t) doGlutamine & Arginine – Poor bioavailability, gut-first metabolism, and why they rarely deliver the muscle-building or performance benefits promisedEcdysterone & Turkesterone – The “natural steroid” hype meets high-quality human RCTsElectrolytes – When they actually matter (and when plain water is sufficient)“Better” Creatine forms (CEE, buffered creatine, HCl, etc.) vs. good old Creatine Monohydrate – spoiler: you’re usually just paying 2–4× more for the same (or worse) resultsLayne breaks down the bold claims vs. reality for each supplement, explains what the science shows they actually do in the body, and identifies the very narrow populations who might see real benefit.Stop wasting money on supplements that underdeliver. Focus on what actually moves the needle.SPONSORS• Outwork Nutrition - Evidence-Based Supplements to Support Your Hard Work: https://outworknutrition.com• Carbon Diet Coach – 14 day free trial: https://joincarbon.com/podcastLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneTIMESTAMPS0:00:00 - Intro0:03:10 - BCAAs0:11:38 - HMB0:19:46 - Glutamine0:24:56 - Arginine0:31:10 - Ecdysterone and Turkesterone0:34:18 - Electrolytes0:42:32 - Alternate Forms of Creatine0:51:03 - Honorable Mentions0:55:42 - OutroSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/the-most-overhyped-supplements-of-all-time-episode-24

The Dr. Layne Norton Podcast is back with Part 2 of the highly anticipated Supplement Series! In Episode 23, Layne dives deep into his Tier 2 supplements — the ones with solid (but not quite elite) evidence for supporting strength, power, endurance, recovery, body composition, stress management, sleep, and overall training performance.Building on the Tier 1 foundations from Episode 22 (creatine, whey protein, and caffeine), Layne breaks down the science, mechanisms, optimal dosing, timing, safety profiles, and real-world takeaways for these promising options. No hype, just evidence-based insights to help you decide what's worth adding to your stack.In this episode, Layne covers:Ashwagandha — Boosts strength, lean mass, testosterone, recovery, sleep, and stress management as a powerful adaptogen.Betaine (Trimethylglycine) — Potential improvements in body composition, strength, power output, and recovery.Rhodiola Rosea — Enhances resistance training performance, endurance, VO2 max, fatigue resistance, recovery, and cognition.Citrulline (including Citrulline Malate) — Increases muscular endurance, reps to failure, nitric oxide production, and reduces fatigue.Beta-Alanine — Buffers acidity for better performance in high-intensity efforts (1–10 minutes), more reps in resistance training.Tart Cherry Extract — Reduces DOMS, speeds strength/power recovery, and lowers inflammation/oxidative stress markers.Melatonin — Improves sleep quality (with indirect benefits for body composition and recovery via better rest).Taurine — Supports endurance, acute power/strength, and recovery from muscle damage/DOMS.Carnitine — Aids recovery, reduces soreness, boosts power/volume, and may enhance high-intensity performance.Magnesium — Benefits exercise performance, recovery, and sleep — especially if you're deficient.Layne references key studies, meta-analyses, practical dosing protocols, side effects to watch for, and who might benefit most.Whether you're chasing PRs, better recovery, or optimized health, this episode cuts through the supplement noise with Layne's no-BS, science-first approach.SPONSORS• Outwork Nutrition - Evidence-Based Supplements to Support Your Hard Work: https://outworknutrition.com• David Protein - Buy 4 cartons, get 1 FREE at: https://davidprotein.com/pages/layneLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneTIMESTAMPS0:00:00 - Intro0:04:05 - Conflict of Interest0:05:17 - Ashwagandha0:13:52 - Outwork Nutrition0:15:28 - Betaine0:20:59 - Rhodiola Rosea0:25:04 - Citrulline0:30:46 - David Protein0:32:21 - Beta-Alanine0:37:26 - Tart Cherry0:42:18 - Melatonin0:45:24 - Taurine0:47:24 - L-Carnitine0:51:35 - Magnesium0:54:34 - OutroSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/supplement-series-tier-2-episode-23

The Dr. Layne Norton Podcast is back with the start of a brand-new Supplement Series! In Episode 22, Layne kicks things off by diving deep into his Tier 1 supplements — the ones with the strongest scientific evidence for real-world benefits in performance, body composition, strength, recovery, and even cognition.This episode covers the true MVPs that Layne considers essential (or close to it) for most people training hard:Creatine Monohydrate — Why it's called the most effective ergogenic aid ever, how it boosts lean mass, strength, repeated sprint/power performance, and even helps cognition (especially under stress like sleep deprivation). We bust myths about kidneys, water retention, and non-responders, plus practical dosing (5 g/day, loading optional).Whey Protein — The gold-standard for hitting leucine thresholds and maximizing muscle protein synthesis. How it supports lean mass gains, preserves muscle in a deficit, improves recovery and training volume over time — and why total daily protein matters way more than perfect timing.Caffeine — One of the most reliable acute performance boosters out there. It cranks up strength, power, endurance, repeated sprints, alertness, and reduces perceived effort — especially when fatigued. We cover optimal dosing (3–6 mg/kg), timing, habituation, sleep trade-offs, and who should be cautious.Layne breaks down the mechanisms, key meta-analyses, practical takeaways, dosing/timing strategies, safety profiles, and who might need to be careful with each one. No hype, no BS — just evidence-based insights to help you cut through the supplement noise.SPONSORS• Outwork Nutrition - Evidence-Based Supplements to Support Your Hard Work: https://outworknutrition.com• Carbon Diet Coach – 14 day free trial: https://joincarbon.com/podcastLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneTIMESTAMPS0:00:00 - Intro0:01:24 - Tier 1 Supplement List0:02:25 - Industry Shenanigans0:04:01 - Tier 1 Criteria0:04:56 - Conflicts of Interest0:09:10 - How Creatine Works0:13:09 - Creatine Physical Benefits0:19:55 - Outwork Nutrition0:21:22 - Creatine Physical Benefits Contd.0:23:48 - Creatine Cognitive Benefits0:27:23 - Creatine Safety0:30:51 - Forms of Creatine0:32:18 - How to Take Creatine0:34:15 - Creatine Non-Responders0:35:19 - Misc Considerations0:36:11 - Whey Protein Quality0:38:04 - Muscle Protein Synthesis0:39:09 - Whey Protein Research0:40:00 - Protein Intake0:42:27 - Protein Health and Safety0:43:16 - Forms of Whey Protein0:47:13 - Whey Protein Dosing0:49:05 - Misc Considerations0:50:42 - Carbon Diet Coach0:51:42 - How Caffeine Works0:53:23 - Research Outcomes0:57:03 - Timing/Dosing0:57:30 - Cognitive Effects0:58:06 - Health Considerations0:58:57 - Training Recommendations1:00:44 - More Dosing1:03:11 - Caffeine + Creatine1:04:18 - Misc Considerations1:05:10 - Closing Thoughts1:06:21 - OutroSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/supplement-series-tier-1-episode-22

In this episode, I’m joined by James Krieger, editor of REPS (Research Review for Exercise & Physique Science), to break down what the meta-analyses really say about building muscle.We cover:• The single most important driver of hypertrophy• The dose–response relationship between volume and muscle growth• Is there a cap to effective volume?• Training to failure: necessary or overrated?• Frequency: how often should you train a muscle?• Stretch-mediated hypertrophy and long-length partials• Why some volume studies appear to “disagree”If you’re tired of social media hot takes and want to understand what the totality of evidence actually shows, this episode is for you.James and I also discuss how we evaluate research quality and why context matters when interpreting studies, something we do every month inside the issues of REPS, where we break down the latest exercise and physique research so you don’t have to.If you want deeper dives into the actual studies discussed in this episode (and many more), check out REPS at https://biolayne.com/repsSPONSORS• REPS - Research Explained in Practical Summaries: https://biolayne.com/reps• Workout Builder – Customized training programs for all experience levels: https://biolayne.com/workout-builderLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneTIMESTAMPS0:00:00 - Intro0:02:39 - James Background0:04:01 - OG Message Boards0:06:24 - Who To Listen To0:15:01 - REPS0:15:53 - Hypertrophy0:26:02 - Compound vs Isolation Movements0:33:05 - Subjective Feelings on Training0:37:50 - Training Flexibility0:43:22 - Training Volume0:47:05 - Defining Sets0:51:59 - Volume Analysis1:02:27 - Research Challenges1:08:12 - Workout Builder1:09:08 - Study Discrepancies1:16:55 - High vs Low Volume1:22:40 - Time Constraints1:25:15 - Volume Cycling1:30:11 - Volume Adaptation1:34:37 - Range of Motion1:44:35 - What Have You Changed Your Mind On1:59:36 - OutroSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/the-science-of-muscle-building-with-james-krieger-episode-21

In this episode, Layne Norton, PhD, dissects the landmark 2025 systematic review & meta-analysis in Advances in Nutrition: "The Effects of Aspartame on Glucose, Insulin, and Appetite-Regulating Hormone Responses in Humans". (PMID: 40381807)This episode is perfect if you've heard claims like "diet soda spikes insulin," "artificial sweeteners cause diabetes," or "aspartame is toxic" — Layne uses this gold-standard review to separate science from fear-mongering.If you're into evidence-based nutrition, skeptical of viral health scares, or just want to know if your Diet Coke habit is secretly wrecking your metabolism — this episode has the receipts.Subscribe for more deep-dive breakdowns of the latest research, and drop a comment: Do you use aspartame? Has this changed your view?SPONSORS• Outwork Nutrition - Evidence-Based Supplements to Support Your Hard Work: https://outworknutrition.com• David Protein - Buy 4 cartons, get 1 FREE at: https://davidprotein.com/pages/layneLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneTIMESTAMPS0:00:00 - Intro0:02:53 - What is Aspartame0:05:15 - Health Claims0:11:26 - How Aspartame is Metabolized0:14:15 - HRCTs0:15:56 - Outwork Nutrition0:18:06 - Study Overview0:19:25 - Inclusion Criteria0:31:43 - Results0:40:38 - David Protein0:42:13 - Results Cont.0:49:51 - Discussion0:58:53 - ConclusionSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/study-deep-dive-does-aspartame-increase-insulin-episode-20

In this wide-ranging Q&A episode, I tackle some of the most debated topics in nutrition, training, and health — and separate what the evidence actually shows from what’s just noise.We start with the new food guide pyramid and whether it reflects the current science, then zoom out to look at how the U.S. compares globally in calorie consumption. From there, we dig into protein intake — how much is really needed to support muscle mass and function in healthy adults, and what the best human data actually tells us.I spend a significant portion of the episode unpacking saturated fat, cardiovascular disease, and cholesterol. We walk through randomized trials, systematic reviews, Mendelian randomization data, and mechanistic evidence to explain why LDL and apolipoprotein B matter, how dietary fats influence cardiovascular risk, and why some popular narratives around butter, seed oils, and lipid oxidation don’t hold up when you zoom out to the totality of human evidence.I also answer practical questions on fat loss for people who feel burned out by calorie counting — what to do if tracking feels like a full-time job, where the most reliable calorie data actually comes from, and how to approach weight loss without falling into metabolic myths around insulin, glucose spikes, or arbitrary blood sugar cutoffs.On the training side, we talk about whether the general public should prioritize strength or hypertrophy, what the data says about strength as a predictor of longevity, machines versus free weights, optimal rep ranges for muscle growth, and why different loading schemes can all work when programmed correctly.I address common myths like creatine and hair loss, explain the biomechanics behind sumo versus conventional deadlifts (and why resetting between reps isn’t “cheating”), and share how I personally eat for health while still applying the same evidence-based principles I recommend to others.We wrap up with genetics and obesity — how much your genes matter, whether specific variants should change how you eat, and why most people don’t need genetically tailored macro ratios to make progress.If you’re tired of oversimplified takes, fear-based nutrition advice, and cherry-picked mechanisms, this episode is a deep dive into what the best human research actually says — and how to apply it in the real world.SPONSORS• Team Biolayne – One-On-One Coaching: https://biolayne.com/online-coaching• David Protein - Buy 4 cartons, get 1 FREE at: https://davidprotein.com/pages/layneLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneTIMESTAMPS0:00:00 - Intro0:00:48 - New Food Guide Pyramid0:10:46 - Counting Calories0:15:28 - Biolayne Coaching0:16:19 - Calorie Databases0:17:53 - Strength vs Hypertrophy0:20:16 - Diet for Optimal Health0:25:43 - Addressing Seed Oil Critique0:43:29 - David Bars0:45:03 - Genetics and Obesity0:47:02 - Glucose and Insulin0:50:46 - Machines vs Free Weights0:52:13 - Creatine and Hair Loss0:53:54 - Deadlift Form0:59:42 - Rep Range for Hypertrophy1:02:56 - OutroSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/ama-03-episode-19

Building muscle doesn’t happen in the gym alone. In Part 2 of this series, I break down the nutrition and supplementation variables that actually matter for maximizing muscle growth and which ones are overhyped or misunderstood.We start with protein: how much you really need, why protein quality matters, the role of essential amino acids and leucine in stimulating muscle protein synthesis, and how protein distribution across the day can influence results. I also dive into how protein needs change with age, why older adults require higher per-meal and daily protein intakes, and practical recommendations to offset age-related anabolic resistance.From there, we cover energy intake: how caloric deficits impair muscle protein synthesis, why massive surpluses don’t accelerate lean mass gains in trained lifters, and how to think about maintenance versus small surpluses depending on training status.Finally, I break down the supplements that are actually supported by strong evidence — including creatine and whey protein: what they do, how they work, and how to use them effectively. We also cover common factors that can sabotage muscle growth, like smoking, excessive alcohol, poor sleep, and inappropriate use of NSAIDs or high-dose antioxidants.If you want a clear, science-based framework for using nutrition and supplements to support muscle growth, without gimmicks or misinformation, then this episode is for you.SPONSORS• Carbon Diet Coach – 14 day free trial: https://joincarbon.com/podcast• Outwork Nutrition - Evidence-Based Supplements to Support Your Hard Work: https://outworknutrition.comLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneTIMESTAMPS0:00:00 - Intro0:05:02 - Most Important Thing0:05:35 - Protein Structure0:07:09 - Protein Digestion0:09:55 - Protein RDA0:10:40 - Nitrogen Balance0:12:24 - Muscle Turnover0:14:09 - Amino Acids0:19:35 - mTOR0:23:12 - Carbon Diet Coach0:24:12 - How Much Protein0:29:56 - Protein Distribution0:39:08 - Protein and Aging0:45:04 - Protein Quality0:50:50 - Outwork Nutrition0:52:17 - Calories1:01:23 - Supplements1:05:16 - Things to Avoid1:13:10 - OutroSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/keys-to-building-muscle-part-2-training-episode-18

How do muscles actually grow — and what really matters for hypertrophy?In this episode, I break down muscle growth from the ground up, starting with muscle structure and working all the way through the practical training variables that actually drive hypertrophy.We cover how muscle fibers are built, why muscle cells are uniquely multi-nucleated, and how satellite cells and myonuclei influence growth potential and long-term adaptations (including the concept of “muscle memory”). From there, we dig into how resistance training shifts net protein balance, why muscle protein synthesis and breakdown both rise with training, and why hypertrophy is often delayed when people first start lifting.A major focus of this episode is mechanotransduction — how mechanical loading from resistance training is converted into chemical signals that stimulate muscle growth. We unpack what we know (and don’t know) about mTOR signaling, phosphatidic acid, kinase pathways, and why mechanical tension is the primary driver of hypertrophy.From there, the episode gets highly practical. We break down:• Why proximity to failure matters more than load• How volume really works (and why “dose-dependent” doesn’t mean linear)• The role of training frequency and how to distribute volume• Why stretch and lengthened positions matter for growth• Load and rep ranges for hypertrophy vs strength• Exercise selection, machines vs free weights, and compound vs isolation lifts• Rep tempo, intensity techniques, and what doesn’t meaningfully affect growth• Why systemic hormone spikes from training don’t predict hypertrophyI close with clear, evidence-based takeaways you can actually apply: how hard to train, how much volume most people need, when failure makes sense, how to structure exercises, and how to prioritize effort, recovery, and adherence over gimmicks.If you want a science-based framework for building muscle — without myths, hype, or unnecessary complexity — this episode lays it out step by step.SPONSORS• Workout Builder – Customized training programs for all experience levels: https://biolayne.com/workout-builder• Team Biolayne – One-On-One Coaching: https://biolayne.com/online-coachingLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneTIMESTAMPS0:00:00 - Intro0:04:53 - Muscle Function0:06:23 - Muscle Fibers0:10:48 - Satellite Cells0:13:47 - Myonuclei Fusion0:15:04 - Drug Testing Implications0:20:17 - Lifetime Natty0:21:14 - Trans Athletes0:24:02 - Workout Builder0:24:58 - Sarcomeres0:27:23 - Hypertrophy vs Hyperplasia0:30:06 - Increase in Muscle Cell Size0:31:00 - Net Protein Balance0:31:57 - Muscle Protein Breakdown0:37:52 - Mechanotransduction0:39:32 - Biochemical Explanation0:49:05 - Mechanical Tension0:50:06 - Training Intensity0:55:32 - Muscular Failure1:01:54 - Team Biolayne1:02:44 - Training Volume1:15:38 - Training Frequency1:20:45 - Muscle Stretch1:22:30 - Load & Reps1:26:42 - Exercise Selection & Order1:29:24 - Rep Tempo1:30:58 - Other Considerations1:33:15 - Systemic Hormones1:35:10 - Practical Takeaways1:41:56 - OutroSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/keys-to-building-muscle-part-1-training-episode-17

In this Building Muscle Masterclass, I sit down with Dr. Stu Phillips — the world’s most cited researcher in exercise science and protein metabolism. If you care about building muscle, eating enough protein, lifting smarter, or cutting through the noise in the fitness world, this is a must-listen.Stu and I go deep on the biggest questions in hypertrophy and nutrition, backed by some of the most important studies in the field:• What actually drives muscle growth and what most people still get wrong• How much protein you should really eat to maximize hypertrophy (and what the meta-analyses say)• Whether high-protein diets harm your kidneys (spoiler: nope)• Plant vs. animal protein: does the source matter, or is it all about leucine?• Do hormone spikes from training matter for gains?• Should women change their programming based on menstrual cycle phase?• The truth about “lifting heavy” — do you need it for hypertrophy?And MOREIf you want the clearest, most up-to-date breakdown of protein science and muscle growth from the guy who literally did the research I base many of my recommendations on… this is your episode.SPONSORS• Carbon Diet Coach – 14 day free trial: https://joincarbon.com/podcast• Workout Builder – Customized training programs for all experience levels: https://biolayne.com/workout-builderLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneFOLLOW STUhttps://www.instagram.com/mackinprofhttp://www.twitter.com/mackinprofTIMESTAMPS0:00:00 - Intro0:01:50 - Background0:08:33 - Biochemistry First0:12:02 - Student Experience0:14:53 - Single Most Important Thing for Muscle Growth0:16:04 - Mechanisms of Hypertrophy0:19:48 - Consistency is Key0:21:46 - Muscle Growth and Hormones0:28:34 - Acute vs Chronic0:32:42 - Cortisol0:36:19 - Carbon Diet Coach0:37:19 - Muscle, Hormones, and Training for Women0:49:56 - Training Auto-Regulation0:55:42 - How Much Protein1:08:06 - Workout Builder1:09:02 - Protein and Kidneys1:26:20 - Muscle and Metabolic Health1:30:05 - Cell Journal Controversy1:34:45 - Plant vs Animal Protein1:38:50 - Protein Distribution1:47:40 - Muscle for Disease Prevention1:51:20 - Carnivore Diet1:52:33 - Rep Ranges for Hypertrophy1:53:54 - Creatine1:55:12 - Final Question1:57:12 - OutroSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/building-muscle-masterclass-protein-and-lifting-with-dr-stu-phillips-episode-16

In this week’s Q&A episode, I dig into your most common questions — from supplements to training to nutrition — and break them down with actual data, not influencer mythology. If you’ve ever wondered whether collagen is worth the hype, if fiber does more than “help you poop,” or whether turkesterone is anything more than TikTok creatine-with-a-fedora… this episode is for you.We cover:• Collagen:Does it help joints? Skin? Connective tissue? Muscle? I walk through the clinical trials (including the ones influencers never mention) and explain where collagen actually works… and where it absolutely doesn’t.• Fiber:Yes, it helps your gut — but that’s just the start. We look at the research on mortality risk, insulin resistance, weight loss, inflammation, CKD, energy balance, colon cancer, and why higher fiber intake consistently predicts better health across multiple systems.• Turkesterone & Ecdysteroids:The internet loves calling this “natural anavar.” The human data… does not. I break down the preliminary studies, the animal research, and what’s real versus what’s marketing.• Burnout & Training Balance:How I manage training, work, and life without flaming out — and what actually matters for long-term consistency.• Protein Needs After 40:Do you need more protein as you age? What does the research say about anabolic resistance, amino acid signaling, and muscle protein synthesis in older lifters?• Things That Hurt Muscle Growth:Ice baths, alcohol, smoking, NSAIDs, corticosteroids — we go through the actual evidence on what blunts hypertrophy, what doesn’t, and what matters in the real world.• Sugar & Weight Gain:Do non-diabetics need to “fear” sugar? Or does it really come down to calories? We dig into metabolic ward studies, DIETFITS, high-sucrose diets, and the boring reality that calorie balance still wins.• Men vs. Women in Training & Nutrition:Sex differences in hypertrophy, strength gains, metabolic rate, and menstrual cycle effects on performance — what’s real and what’s bro-science?• Training Over 50:How many sets do you actually need to build muscle after 50? We review the dose-response data, multi-set vs single-set research, and the RCTs showing older adults can grow — there are no “non-responders.”All research is cited directly from the studies mentioned — RCTs, meta-analyses, mechanistic papers, and long-term cohorts.If you want evidence without the nonsense, this is your episode.*SPONSORS*• Workout Builder – Customized training programs for all experience levels: https://biolayne.com/workout-builder• Physique Coaching Academy - Advanced Coaching and Nutrition Education for Personal Trainers: https://physiquecoachingacademy.comLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayne*TIMESTAMPS*0:00:00 - Intro0:01:02 - Collagen?0:09:18 - Benefits of fiber?0:15:23 - Workout Builder0:16:18 - Turkesterone?0:18:56 - How do I avoid burnout?0:25:56 - How do I train?0:27:31 - More protein over age 40?0:30:19 - Sugar consumption?0:35:04 - Physique Coaching Academy0:36:05 - Men vs women building muscle?0:40:35 - Optimal number of sets over age 50?0:46:04 - What negatively impacts muscle growth?0:52:41 - OutroSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/ama-02-collagen-fiber-muscle-growth-training-and-more-episode-15

Ultra-processed foods (UPFs) get a lot of negative press, but are they always as bad as people think? In this episode, I sit down with researcher Samuel Dicken, who recently led a high-profile randomized controlled trial on UPFs that challenged some long-held assumptions.We dig into what his study found, why not all UPFs are created equal, and how the way we consume them might matter more than the processing label itself. At the same time, we explore why sticking with mostly minimally processed foods is still a sound piece of nutrition advice.If you’ve ever wondered whether “ultra-processed” automatically means “unhealthy,” or how to make sense of the latest UPF research, you won’t want to miss this conversation.SPONSORS• David Protein - Buy 4 cartons, get 1 FREE at: https://davidprotein.com/pages/layne• Carbon Diet Coach – 14 day free trial: https://joincarbon.com/podcastLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneFOLLOW SAMhttps://www.instagram.com/drsamueldickenhttp://www.twitter.com/SamuelDickenUKTIMESTAMPS0:00:00 - Intro0:02:16 - Study Design0:12:07 - Study Results0:14:03 - NOVA Food Classification0:18:53 - Research Misinterpretations0:21:04 - Food Choices0:24:34 - Zero Calorie Beverages0:31:40 - Coke HFCS vs Cane Sugar0:34:07 - David Protein0:35:42 - Unintended Consequences0:43:55 - LDL Cholesterol0:47:50 - Ultra-Processed Foods Good or Bad?0:53:11 - Are Ultra-Processed Foods Addictive?1:02:10 - Carbon Diet Coach1:03:10 - Nuance of Ultra-Processed Foods1:07:35 - Negative Effects of UPFs Independent of Calories1:13:09 - Criticism of Study Design1:16:48 - Government Regulation1:23:58 - Behavior Changes1:29:37 - Animal vs Plant Based1:33:08 - Personal Diet Habits1:35:16 - Use Cases For UPFs1:38:33 - The Practical Realities of Research1:45:24 - What Have You Changed Your Mind On1:49:14 - PhD Discussion1:52:42 - OutroSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/ultra-processed-foods-with-dr-samuel-dicken-episode-14

Creatine is SAFE, the verdict is in!After decades of people claiming that creatine will wreck your kidneys, liver, & various other claims, a new study has put these myths to bed. In my latest episode of the Dr. Layne Norton Podcast, I go DEEP on the most comprehensive dataset to date: a brand new meta-analysis by Kreider et al. (2025) which reviewed 250+ studies, covering over 26,000 participants, some lasting more than a decade, and examined nearly 50 potential side effects.The verdict? Absolutely no evidence of harm.I broke down the full paper, the methods, and what this means for athletes and everyday lifters in the latest episode of the podcast.SPONSORS• Outwork Nutrition - Evidence-Based Supplements to Support Your Hard Work: https://outworknutrition.com• REPS Research Review: https://biolayne.com/reps LAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneTIMESTAMPS0:00:00 - Intro0:01:33 - Meta Analysis Overview0:02:14 - Creatine is NOT a Steroid0:03:10 - ATP0:05:13 - Creatine from Body and Food0:06:05 - Creatine Non-Responders0:06:27 - Creatine Dose0:07:10 - Creatine Benefits0:10:18 - Outwork Nutrition0:11:46 - Interesting Associations0:13:48 - Safety Questions0:15:03 - Importance of Placebo0:17:05 - Study Methods0:20:05 - Study Results0:26:08 - REPS Research Review0:26:57 - Hair Loss0:29:04 - Creatine is Safe and Effective0:30:54 - Types of Creatine0:36:54 - Creatine for Kids0:38:50 - Recommendations0:39:39 - OutroSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/study-deep-dive-creatine-is-safe-episode-13

Is sugar really to blame for the obesity epidemic? In this episode, I break down one of the most common nutrition myths. Using evidence from epidemiology, randomized controlled trials, and meta-analyses, Layne explains why sugar and high fructose corn syrup aren’t the independent culprits they’re often made out to be. Instead, he reveals what the research actually says about calories, metabolism, and how oversimplified narratives mislead the public. If you’ve ever been told “sugar is poison,” this episode will challenge your perspective with science, not fear.SPONSORS• REPS Research Review: https://biolayne.com/reps• Carbon Diet Coach – Achieve your goals with Carbon’s adaptive macro coaching app: https://joincarbon.com/podcastLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneTIMESTAMPS0:00:00 - Intro0:02:49 - Research Funding and Bias0:14:52 - Previous Beliefs on Sugar0:15:31 - Types of Sugar0:17:42 - Previous Beliefs on HFCS0:19:37 - Leptin0:23:56 - Gary Taubes0:24:33 - REPS0:25:22 - Carbohydrate Insulin Model of Obesity0:27:42 - The Case for Sugar Causing Obesity0:30:08 - The Moment I Started to Change My Mind0:32:29 - Ice Cream0:34:18 - Researching Sugar0:39:15 - Mechanisms vs Outcomes0:41:10 - Classic Study0:42:28 - Mark Haub Twinkie Diet0:45:46 - Carbon Diet Coach0:46:46 - Metabolic Health0:48:03 - Glycemic Index0:49:51 - Sugar Intake vs Calorie Intake0:52:30 - Sugar Addiction0:54:21 - Let's Be Clear0:56:36 - Data Over FeelingsSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/did-sugar-cause-the-obesity-epidemic-episode-12

Building muscle isn’t just about aesthetics — it’s about survival. 💪In this episode of The Dr. Layne Norton Podcast, I break down why muscle is the most underrated organ of health. You’ll hear how it lowers your risk of cardiovascular disease, cancer, infections, Alzheimer’s, and depression — while also protecting against falls, fractures, and the effects of aging.We’ll dive into:- How muscle acts like an endocrine organ, releasing myokines that fight disease and slow tumor growth.- Why more muscle means longer life, better quality of life, and faster recovery if you get sick.- The myth that you “can’t build muscle after a certain age” — and why it’s total BS.- How just 50 minutes of resistance training a week can change your health trajectory.If you want to live longer, feel stronger, and age on your own terms, this is the episode you don’t want to skip.SPONSORS• Workout Builder – Customized training programs for all experience levels: https://biolayne.com/workout-builder• Team Biolayne – One-On-One Coaching: https://biolayne.com/online-coachingLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneTIMESTAMPS0:00:00 - Intro0:02:18 - Muscle for Vanity0:03:39 - Cultural Perception of Muscles0:06:13 - Women in the Gym 0:08:11 - Muscle for Health0:10:34 - Sarcopenia0:15:28 - Insulin Sensitivity0:22:59 - Workout Builder0:23:54 - Sink Metaphor0:26:07 - Organ of Health0:28:11 - Quality of Life0:32:35 - Cardiovascular Disease Mortality0:36:35 - Cancer Mortality0:42:44 - Other Mortality0:44:45 - Risk of Disease0:49:22 - Mental Health0:56:19 - Pain & Injuries0:57:35 - Team Biolayne0:58:26 - Wasting Diseases1:00:59 - Anyone Can Build Muscle1:03:20 - OutroSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/why-you-should-try-to-build-muscle-episode-11

Learn how to build muscle from the world's most renowned researcher on muscle growth, Professor Brad Schoenfeld. In this absolute masterclass, Dr. Schoenfeld lays out the non-negotiables for muscle growth, what matters most, what matters least, and how to practically implement these recommendations. If you care about building muscle, you do not want to miss this episode.SPONSORS• Workout Builder – Customized training programs for all experience levels: https://biolayne.com/workout-builder• REPS Research Review: https://biolayne.com/repsLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneFOLLOW BRADhttps://www.instagram.com/bradschoenfeldphdhttp://www.twitter.com/bradschoenfeldTIMESTAMPS0:00:00 - Intro0:03:20 - How Brad Got Started0:08:24 - Vanity vs Health0:14:46 - Muscle Quality0:16:54 - Muscle and Insulin Resistance0:22:00 - Most Important Thing for Hypertrophy0:23:38 - Training to Failure0:34:51 - Misinformation on Social Media0:39:02 - Mechanical Tension0:46:21 - Training Volume0:52:24 - Workout Builder0:54:45 - Dose Response0:59:27 - Overtraining1:07:19 - Muscle Damage and Soreness1:14:35 - Mechanisms vs Outcomes1:19:52 - Cortisol1:21:15 - Acute vs Chronic1:24:04 - Mechanisms vs Outcomes1:25:43 - REPS Research Review1:26:32 - Research on Volume1:34:01 - Training Frequency1:40:06 - Range of Motion1:46:27 - Intensity Tricks1:50:32 - Rep Cadence1:58:03 - Exercise Selection2:04:43 - Final Question2:13:53 - OutroSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/how-to-build-muscle-masterclass-with-professor-brad-schoenfeld-episode-10

The carnivore diet. The keto diet. Intermittent fasting. Plant based. The [insert diet here]... There are so many popular diets out there being promoted by various diet tribes, many of which have limited evidence for their efficacy. All of which have various positives and negatives associated with them. In this episode, I systematically break down some of the most popular diets and discuss both the positives and negatives to these dietary approaches. If you are confused by all the noise on social media, this episodes is a MUST LISTEN to help simplify things for you!SPONSORS• Carbon Diet Coach – Achieve your goals with Carbon’s adaptive macro coaching app: https://joincarbon.com/podcast• Team Biolayne – One-On-One Coaching: https://biolayne.com/online-coachingLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneTIMESTAMPS0:00:00 - Intro0:01:47 - Bodybuilding History0:09:42 - Flexible Dieting0:25:33 - Carbon Diet Coach0:26:33 - Mediterranean Diet0:30:10 - Plant Based Diet0:39:55 - Low Carb Diets0:48:30 - Team Biolayne0:49:20 - Carnivore Diet0:59:13 - Fasting Diets1:06:54 - SummarySHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/pros-and-cons-of-popular-diets-episode-9

Not everyone has the time or desire to go to school and get a PhD or a Master's degree in a scientific field. Even getting a scientific degree does not ensure that you will be able to read and interpret research appropriately. But just because you may not have a scientific degree or the desire to achieve one, doesn't mean you can't still learn to think like a scientist.This isn't about a fancy education... it's about a state of mind and way of thinking. It's less complicated than you might think and there are some simple, systematic ways to ask questions and evaluate evidence that anyone can implement. In this episode I break down how YOU can think like a scientist and be better equipped to evaluate and interpret evidence.SPONSORS• REPS Research Review: https://biolayne.com/reps• Physique Coaching Academy - Advanced Coaching and Nutrition Education for Personal Trainers: https://physiquecoachingacademy.comLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneTIMESTAMPS0:00:00 - Intro0:03:57 - Areas of Expertise0:10:12 - The Scientific Method0:12:47 - Politics vs Science0:17:07 - Why Study Results Vary0:22:26 - REPS Research Review0:23:16 - Research Funding0:27:06 - How To Read Research0:29:29 - Scientific Consensus0:30:58 - Skepticism0:34:51 - Hierarchy of Evidence0:39:51 - Physique Coaching Academy0:40:52 - Hierarchy of Evidence Continued0:45:40 - The Power of Placebo0:47:50 - Single vs Double Blind0:49:44 - Meta Analysis0:51:04 - Mechanisms vs Outcomes0:55:54 - Cherry Picking Data0:57:28 - Practical Considerations of Research1:00:40 - OutroSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/how-to-think-like-a-scientist-episode-8