BCAA stands for Branch Chain Amino Acids and along with L-glutamine, not only helps build and energize muscle, but also helps support the immune system. They assist the muscles in the building of protein, help to eliminate muscle breakdown during exercise, and regulate the protein metabolism throughout the entire body. This product is perfect for athletes looking to build muscle without adding more calories into their diet! Or for older adults looking to keep muscle mass from breaking down or for individuals who had muscle surgery or muscle loss. BCAA with L-glutamine is a must if you want lean muscle! This product is free of artificial sweeteners, is sweetened with natural stevia and has a refreshing orange flavor!