Protein Deep Dive

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, and more • How dietary protein is digested, absorbed, and used by your muscles • Why leucine content matters and how different protein sources (whey vs. wheat vs. collagen) dramatically affect MPS • The “muscle full effect,” protein thresholds by age, and why protein distribution across meals may (or may not) matter • How high-protein diets impact fat loss, satiety, energy expenditure, and long-term body composition • The truth about protein and health outcomes: mortality, cardiovascular disease, cancer, kidney function, and type 2 diabetes — with the latest evidence separated from the hype and confounding factors Whether you’re a casual gym-goer, competitive athlete, bodybuilder, powerlifter, or just someone who wants to optimize muscle and health, this episode gives you the complete, evidence-based picture on protein intake, quality, timing, and safety. Plus, tips for vegans and how to actually use this information day-to-day. If you want to understand protein at a level most people (and even many coaches) never reach, this is the episode for you! #Protein #MuscleProteinSynthesis #HighProteinDiet #LayneNorton #EvidenceBasedNutrition #BodybuildingScience #FatLoss #MuscleBuilding 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/layne LAYNE'S COMPANIES Carbon Diet Coach: https://joincarbon.com/podcast Outwork Nutrition: https://outworknutrition.com REPS Research Review: https://biolayne.com/reps Workout Builder: https://biolayne.com/workout-builder Team Biolayne: https://biolayne.com/online-coaching Physique Coaching Academy: https://physiquecoachingacademy.com FOLLOW LAYNE http://www.facebook.com/laynenorton http://www.twitter.com/biolayne http://www.instagram.com/biolayne TIMESTAMPS 0:00:00 - Intro 0:01:20 - Protein Chemistry Overview 0:16:15 - Outwork Nutrition 0:17:43 - Protein Digestion and Absorption 0:21:17 - How Protein Affects Muscle 0:37:00 - David Protein 0:38:35 - Protein Distribution 0:43:05 - Protein and Fat Loss 0:48:09 - Protein and Mortality 0:50:32 - Protein and Cardiovascular Disease 0:52:06 - Protein and Cancer 0:53:32 - Protein and Kidney Disease 0:56:38 - Protein and Type 2 Diabetes 0:57:53 - Recommendations 1:06:53 - Outro SHOW NOTES https://biolayne.com/podcasts/dr-layne-norton-podcast/protein-deep-dive-episode-29