Proof.Fit

Branched-Chain Amino Acids

10 benefits mapped to clinical evidence across supplements.

Benefit Evidence

Main Effects
Muscle growth

Anabolic signaling +mTOR

Muscle preservation +gains

Strong
6,248
Body composition

Muscle mass↑, breakdown↓

Fat loss, insulin↑

Strong
7,957
Strength

Frailty/Walking +0.7

Strength/Muscle +5–15%

Strong
5,409
Workout performance

Muscle sparing/anabolism +

Endurance/performance +

Strong
3,879
Exercise recovery

Anabolic recovery +MPS

Lower breakdown -CK

Glycogen sparing +135%

Strong
3,439
Muscle maintenance

Anabolism +MPS

Proteolysis ↓ balance

+2d N balance

Strong
2,993
Protein source

Protein gain +BCAA

Protein breakdown -BCAA

Strong
2,112
Endurance

BCAA/Leu: better endurance

Lower fatigue, +performance

Strong
1,298
Energy & Fatigue

Less fatigue, better endurance

Reduced damage, faster recovery

Moderate
354
Muscle soreness

Less soreness, CK↓

Soreness↓, recovery↑

Weak
76