BCAA stands for branched chain amino acids, the three amino acids being L-Leucine, L-Isoleucine and L-Valine. These support muscle growth, enhance athletic performance and reduce fatigue. BCAA may also reduce muscle damage. Oxygen intake may also be increased by these amino acids and Carbon Dioxide reduced. This formulation provides free form branched chain amino acids to promote optimal absorption and assimilation, along with vitamin B6, an important factor in amino acid metabolism.