Muscle Leb BCAA Powder is a potent and precisely balance blend of the branched chain amino acids L-Leucin, L-Isoleucine and L-Valine, which are important building blocks of Jean muscle tissue. In addition to their lean muscle building properties, BCAAs are metabolized directly in the muscle, and may thereby improve nitrogen retention by sparing other amino acids for repair and rebuilding, clinical studies show that BCAAS effective anticatabolic (issue sparing) effect, whilst BCAAs taken post-axercise with a carbohydrate and protein shake, supports muscle building and recovery efforts.