Nutrition
Essential Amino Acid Threshold
Essential amino acid threshold is the leucine-rich per-meal dose that maximally triggers muscle protein synthesis—key for growth and muscle retention.
Essential amino acid threshold is the leucine-rich dose—often about 2–3 grams leucine per meal—needed to maximally trigger muscle protein synthesis in a sitting. Hitting the threshold matters for hypertrophy and aging muscle retention, not just total daily grams.
Animal proteins reach threshold easily; plant meals may need larger portions or blending sources.
Common questions
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Can plant protein hit the leucine threshold?
Yes—combine legumes, soy, or larger portions so each meal delivers roughly 2–3 grams leucine. A leucine supplement is optional, not required for everyone.
Related terms
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