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