Branched Chain Amino Acids (BCAAs) are the three main amino acids that have similar structures to those which have beneficial influences on muscles. They can also be found naturally in any protein food product such as meat and eggs. Those who have extremely high protein diets may not need these kinds of supplements, but they are hugely popular with fitness fanatics and body builders who use more amino acids than they can get from food. BCAA 500 mg consists of three essential amino acids with a branched chain: L-leucine, L-isoleucine and L-valine. The abbreviation BCAA stands for Branched Chain Amino Acids. The BCAAs in our sports product are a structural component of muscle tissue; about 30% of the proteins in muscle tissue consists of BCAA. Necessary for optimal functioning of the branched-chain amino acids are vitamin B6, vitamin C, zinc, chrome and magnesium, as well as a number of other cofactors.