PROTEINLIMITED
BCAAs
Mostly obsolete if you eat enough protein. Which you probably do.
EFFECTIVE DOSE
Not applicable — food protein already contains BCAAs in the right ratio
HOW IT WORKS
Leucine triggers MPS, but without the other 6 essential amino acids the response caps out fast.
WHAT THE EVIDENCE SUPPORTS
- Possible modest fatigue reduction in fasted training
WHAT TO LOOK OUT FOR
- If you already eat 1.6+ g/kg of protein, BCAAs add nothing.
- EAAs (essential amino acids) are a better buy if you actually need aminos.
- Flavored BCAA drinks are mostly a marketing win, not a physiological one.
SOURCES
Reviewed 11/1/2025 · Brawn Supplement Reviewer
Educational content. Not medical advice. Talk to a licensed professional before starting any supplement, especially if you take medications or have a medical condition.