Performance
BCAAs
Also known as: Leucine, Isoleucine, Valine, 2:1:1 ratio
A branched-chain amino acid blend in a 2:1:1 leucine-to-isoleucine-to-valine ratio, formulated in instantized (micronized) form for improved solubility. BCAAs support muscle protein synthesis and may reduce exercise-induced fatigue, though whole protein sources provide comparable benefits at lower cost.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Primary uses
- Muscle preservation
- Intra-workout
- Fatigue reduction
- Muscle protein synthesis
- Exercise recovery
- Muscle preservation during caloric deficit
- Reduction of exercise-induced fatigue
- reduce muscle breakdown (anticatabolic)
- endurance performance
- post-workout recovery
How it works
- Leucine triggers mTOR
- May reduce muscle breakdown
- Incomplete without other EAAs
Dosage
- Typical range
- 5-10g
- Timing
- Intra-workout or fasted training
- With food
- Either
- Duration
- During training periods
- Special populations
- Fasted training, low protein meals
Forms
- Powder
- Capsule
- Capsules· 70/100
- Tablets· 70/100
- drinks· 70/100
- 2:1:1 ratio blend· 70/100
Safety
Common side effects
- Generally well tolerated
Contraindications
- MSUD (rare genetic)
Products containing BCAAs
Top-scoring supplements in our catalog that list BCAAs on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Superseded by EAAs or adequate protein, but still useful
Grade B: Some human trials support key claims; further confirmation needed.
BCAAs compared head-to-head
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.