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!