BCAA's are important components of muscle proteins.

The BCAA is composed of three branched chain amino acids are Leucine, Valine and Isoleucine.

The BCAA is the first amino acids that are cleaved by muscles during exercise. Without a sufficient amount of them, the body gets the BCAA needs from muscles resulting not only not created conditions for muscle growth, but on the contrary. Muscles autodegrated, and lose in size and strength.
A quality supplement BCAA amino acid prevents the degradation of muscle tissue from intense exercise. Extends the period of hard training, prevents muscle catabolism and further helps dramatically better muscle recovery.