1) BCAA’s aid in muscle recovery, protein synthesis, and the prevention of DOMs (i.e., delayed onset muscle soreness).
- “It has been reported that BCAA supplementation before exercise attenuates the breakdown of muscle proteins during exercise in humans and that leucine strongly promotes protein synthesis in skeletal muscle in humans and rats, suggesting that a BCAA supplement may attenuate muscle damage induced by exercise and promote recovery from the damage.”
— Excerpt taken from the review, “Nutraceutical Effects of Branched-Chain Amino Acids on Skeletal Muscle” (PDF may be accessed here, courtesy of the Journal of Nutrition).

- I also suggest reading “Exercise Promotes BCAA Catabolism: Effects of BCAA Supplementation on Skeletal Muscle during Exercise”, a review that further explains the relationship between exercise and BCAA supplementation (with special emphasis on BCAA catabolism, or “the breakdown of molecules into smaller molecules”). PDF found here.
2) BCAA’s decrease the likelihood of becoming obese.
- “Higher dietary BCAA intake is associated with lower prevalence of overweight status/obesity among apparently healthy middle-aged adults.”
— Excerpt taken from the study, “Higher Branched-Chain Amino Acid Intake Is Associated with a Lower Prevalence of Being Overweight or Obese in Middle-Aged East Asian and Western Adults” (abstract may be accessed here, courtesy of the Journal of Nutrition).