Strength · Size · Recovery 4.55 g Per Serving 66 Total Servings 2:1:1 BCAA Ratio Research Proven Branched Chain Amino Acids Dietary Supplement BCAA'S - Branched Chain Amino Acids - are the 3 unique and essential amino acids Leucine, Isoleucine and Valine. These are naturally occurring molecules that your body uses to build lean muscle proteins. BCAA's are the only amino acids that are metabolized directly in muscle tissue and help to prevent muscle breakdown, promote muscle protein synthesis, provide fuel for muscular energy, speed muscle recovery, enhance endurance and support anabolic hormone production. Each serving of AST Sports Science BCAA's deliver you 4550 milligrams of the highest quality branched chain amino acids in easy to swallow, rapid release capsule. Take anytime for rapid muscle uptake to enhance recovery and performance.