When it comes to nutrients that stimulate muscle growth, the three branched chained amino acids (leucine, isoleucine and valine) stand alone. In particular, exciting new research demonstrates that leucine is the most anabolic amino acid among the BCAAs, and has a unique ability to promote muscle growth and repair plus enhances fat loss. Based on the latest research on leucine metabolism and muscle building, MHP has created BCAA 10X - the most advanced, leucine-loaded formula ever created. BCAA 10X features a 10:1:1 BCAA ratio containing 10 times the amount of leucine.