Active BCAA is the best branched chain amino acids. ACTIVE BCAA from Steadfast is a cutting-edge compound for muscle growth and repair. It has the optimum 2:1:1 ratio of L-leucine, L-isoleucine, and L-valine, three of the most important amino acids, making it the best supplement for muscle building and recovery. L-Arginine, a muscle builder and fatigue-reducer, L-Glutamine, and fructose, a fruit-based carbohydrate with a low GI, make up Active BCAA, a post-workout supplement that is crucial for all sports.