SMASH BCAA provides a 5 gram blend of the three critical Branched Chain Amino Acids (L-Leucine, L-Isoleucine and L-Valine). Branched Chain Amino Acids (BCAA's) are essential for the body, and help repair muscles and decrease muscle soreness. Leucine - The primary activator of the mTOR pathway, the most researched pathways of muscle growth.Isoleucine - Increases glucose uptake and the usage during exercise to induce muscle protein synthesis.Valine -Supports muscle synthesis.Nothing to hide. No Proprietary Blends. Manufactured in the USA in FDA Registered and GMP Certified Facilities under strict control standards.