BCAA Supports Muscle Growth, Supports Recovery BCAA contains the essential branched chain amino acids - Leucine, Isoleucine, and Valine - in the proven and well-documented 2:1:1 ratio. These key amino acids are used for energy production in muscle and are thought to be responsible for muscle growth and recovery. BCAAs have the potential to increase muscle strength and size by optimizing the natural hormonal environment. Decreased post-exercise soreness, improved endurance, and fat loss are some of the other key benefits of branched chain amino acid consumption