Summary
Dr. Layne Norton and his PhD advisor Dr. Donald Layman discuss protein science including optimal intake, timing, distribution, and the leucine threshold for muscle protein synthesis.
Key Points
- Protein intake affects muscle protein synthesis
- Leucine threshold triggers muscle building
- Protein distribution throughout day matters
- Quality protein sources and bioavailability
- Older adults need more protein per meal
- Practical protein intake recommendations
Key Moments
Asking the right question: how much protein triggers muscle protein synthesis
Dr. Donald Layman, Layne Norton's PhD advisor, explains that being a good scientist means asking the right question about protein -- not just how much total, but how much per meal to trigger the leucine threshold for muscle building.
"Being a good scientist, you have to ask the right question to get the right answer. How much prote"
The leucine threshold and why protein distribution matters
Dr. Layman explains the leucine threshold concept -- the minimum leucine content per meal needed to trigger muscle protein synthesis -- and why distributing protein across meals is more effective than front-loading or back-loading.
"Being a good scientist, you have to ask the right question to get the right answer. How much prote"
Older adults need more protein per meal due to anabolic resistance
As people age, their bodies become less efficient at utilizing dietary protein, a phenomenon called anabolic resistance. Dr. Layman recommends higher per-meal protein targets for older adults to maintain muscle mass and function.
"Being a good scientist, you have to ask the right question to get the right answer. How much prote"
