BCAAs
Leucine, isoleucine, and valine blend that may slightly reduce workout soreness, but is usually inferior to complete protein.
BCAAs
Leucine, isoleucine, and valine blend that may slightly reduce workout soreness, but is usually inferior to complete protein.
Usually skip — complete protein or essential amino acids work better for most healthy adults.
BCAAs are the three essential amino acids leucine, isoleucine, and valine, found naturally in dairy, meat, eggs, soy, and other protein-rich foods. Leucine activates mTOR signaling to trigger muscle protein synthesis, but BCAAs alone lack the other essential amino acids needed to sustain it. Evidence supports modest reductions in post-exercise soreness and some clinical benefit in hepatic encephalopathy, while effects on muscle gain, fat loss, and general wellness are limited. They fit best for people training with low protein intake or using clinician-directed liver formulas.
Proven Benefits
Protocol
Onset Time
Who Should Consider
Food Sources
- Whey protein isolate (~5-6 g BCAAs per 25 g scoop)
- Chicken breast (~5 g per 150 g cooked)
- Greek yogurt (~3 g per 200 g serving)
- Firm tofu (~2.5-3.5 g per 150 g serving)
- Eggs (~1.3-1.5 g per 2 large eggs)
How It Works
Leucine activates mTOR, which signals muscle protein synthesis, while isoleucine and valine can serve as energy substrates during exercise. BCAAs also compete with tryptophan for transport into the brain, a proposed reason for small fatigue effects, and in liver disease they may help rebalance amino acid patterns involved in encephalopathy.