1. BCAA powder, Branched Chain Amino Acid 2. leucine, isoleucine, valine 2:1:1 3. Standard: USP26 4. Usage: Sport nutrition BCAA 2:1:1 powder, sport nutritional supplements, muscle development, bodybuilding nutriments The phrase branched-chain amino acids or BCAA is sometimes used to refer to the amino acids having aliphatic side-chains that are non-linear. These are leucine, isoleucine and ...