BCAA (Branched-Chain Amino Acids) Powder is a blend of essential amino acids, including leucine, isoleucine, and valine, crucial for muscle recovery, growth, and endurance. These amino acids cannot be synthesized by the body and must be obtained through diet or supplements. Leucine: 61-90-5 Isoleucine: 73-32-5 Valine: 72-18-4