The Dr. Layne Norton Podcast

In this episode, Dr. Layne Norton delivers a comprehensive, evidence-based breakdown of metabolic adaptation — one of the biggest reasons why fat loss slows down and maintaining weight loss feels so difficult. Layne explains exactly what metabolic adaptation is, how it affects every major component of energy expenditure (BMR, NEAT, exercise energy expenditure, and TEF), and the powerful neuroendoc...

In this listener Q&A, Layne dives deep into your most-asked questions on supplements, protein sources, cholesterol, weight-loss medications, and more. As always, he breaks down the actual research and gives no-BS, evidence-based takeaways you can actually use. Topics covered in this episode: • Creatine HCl – Supplementing with which form of creatine (hydrochloride vs others)? What does the res...

In this deep dive episode, Dr. Layne Norton breaks down everything you need to know about protein — from the molecular level to practical real-world application. We cover: • What protein actually is, how it’s made and broken down in the body • The complete science of muscle protein synthesis (MPS) and muscle protein breakdown (MPB), including the critical roles of mTORC1, leucine, eIF4E, 4E-BP1, a...

Are seed oils (and the polyunsaturated fats they contain) quietly destroying your health… or is the outrage mostly hype and misinformation? In this deep-dive episode, Dr. Layne Norton cuts through the noise with a comprehensive, evidence-first breakdown of the science on seed oils, linoleic acid (LA/PUFA), saturated fat, LDL/ApoB, oxidation, inflammation, and cardiovascular outcomes. Layne directl...

In this episode, Dr. Layne Norton sits down with Professor Bill Campbell, PhD — Director of the Performance & Physique Enhancement Laboratory at the University of South Florida and a leading researcher on body composition, high-protein diets, and resistance training adaptations. They discuss Bill’s high-protein studies in women (including physique athletes, contest prep, older adults, and time...

In this listener Q&A, Layne dives deep into your most-asked questions on training, nutrition, and practical science. As always, he breaks down the actual research and gives no-BS, evidence-based takeaways you can actually use. Topics covered in this episode: • Does cortisol cause fat gain? Plus the impact of low-calorie dieting on cortisol • Sucralose and gut health – new research on dysbiosis...

In this episode, Dr. Layne Norton interviews Professor Jeremy Loenneke — one of the world’s top researchers on blood flow restriction training. They break down how BFR actually works, why metabolite accumulation appears to be the primary driver of its muscle-building effects, practical self-application techniques, and whether expensive cuffs are even necessary. Jeremy also shares his latest thinki...

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 t...

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,...

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...

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? •...

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 use...

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 muc...

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 ho...

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 gr...

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 i...

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: • Colla...

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 th...

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 particip...

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,...

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...

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...

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 th...

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 ed...

In this episode I take YOUR questions! Topics covered in this AMA: • How much protein is used for building muscle? • Is creatine safe for kids? • Does separating fats/carbs amongst different meals lead to additional fat loss benefits? • Should you avoid high protein diets if you’re worried about cancer? • Does creatine affect brain health? • Do OTC pain killers affect muscle growth? • What’s the b...