Science supports the benefits of branched chain amino acids (BCAA's) prior to, throughout, and after training. The group of essential amino acids that make up the BCAA pool include L-Leucine, L-Isoleucine, and L-Valine. The combination of these three amino acids make up over 1/3 of all skeletal muscle in the human body, and they have been shown to play an important role in protein synthesis, and thus muscle growth, repair, and other vital cellular and hormonal functions. L-Glutamine is the most abundant amino acid found in the human body and is arguably the most important in the process of building lean muscle and gaining strength. The refreshing and highly functional USN Amino Stim has been developed to enhance your workout, supporting a heightened output potential while speeding up recovery.