BCCAAs - Branched Chain Amino Acids (BCAAs) contain of three amino acids - Leucine, Valine, and Isoleucine.
BCAAs play a significant role and building and repairing muscle after a  workout, and  also   act  as  a  "Signal''  TO Your  muscle  that  nutrient  are  available for increasing muscle mass. contractile (muscle) protein  are damaged  during  exercise, and muscle  cells  will  use BCAAs  to buffer the loss of certain non-assential amino acids or  to provide  energy  during  long  period  of  exhaustive  training.