Randomized Trialhigh evidence
Ingestion of 20 g of a Plant-derived Protein Blend With and Without Added Leucine or Whey Protein Does not Increase Muscle Protein Synthesis Rates in Older Males.
The Journal of nutrition·August 17, 2026·PMID 42607838
Why it mattersOlder adults often rely on plant proteins, which may be less anabolic than animal proteins. This study shows that 20 g of plant protein, even with leucine fortification, fails to stimulate muscle protein synthesis in older males, challenging assumptions about protein quality and quantity for sarcopenia prevention.
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