Twinlab BCAA Fuel is a powerful combination of the brached chain amino acids (BCAA) L-leucine, L-isoleucine & L-valine providing 2000mg in every serving. It increased nitrogen retention & protein synthesis necessary to build muscle while preventing muscle tissue breakdown, leading to faster recovery & reduced post-workout stiffness. Research shows that branched-chain amino acids (BCAAs) increase lean muscle mass & strength. BCAA Fuel® has been formulated with the specific ratio of these essential amino acids to enhance absorption & muscle tissue recovery. The essential amino acids in BCAA Fuel – L-leucine, L-isoleucine & L-valine – cannot be made by the body & are quickly oxidized during exercise. Supplementing with these BCAAs can play a key role in muscle growth & recuperation. in addition, BCAAs help increase Nitrogen retention & protein synthesis necessary to build muscle while preventing tissue breakdown