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Diet Doctor Podcast · August 22, 2022 · 40m
Protein Quality — Why Source Matters
Dr. Scher explores protein quality beyond total grams — DIAAS scoring, leucine thresholds, amino acid profiles, and why animal protein sources have higher bioavailability than most plant sources.
This summary was generated from show notes and public descriptions, not from a full transcript review. Details may contain inaccuracies.
Highlights
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DIAAS scoring reveals that plant proteins are 20-40% less bioavailable than animal proteins for muscle synthesis
Scher: the Digestible Indispensable Amino Acid Score (DIAAS) — the gold standard for protein quality — shows that most plant proteins score 40-75% while animal proteins score 90-120%. This means more total plant protein is needed to achieve the same muscle protein synthesis.•
The leucine threshold — 2.5-3g per meal triggers muscle protein synthesis, and some plant proteins fall short
Scher: muscle protein synthesis requires a leucine threshold of ~2.5g per meal in young adults and ~3g in older adults. Animal proteins naturally meet this threshold in a standard serving while many plant proteins require larger servings.Was this useful?