Branched-chain amino acids (BCAAs) are essential amino acids that include leucine, isoleucine, and valine. They are called "branched-chain" due to their unique chemical structure, which features a branching point in their molecular chain. BCAAs are important for protein synthesis and energy production, especially during exercise. These amino acids are primarily found in protein-rich foods like meat, dairy, and legumes. BCAAs can also be taken as dietary supplements to support muscle recovery and reduce exercise fatigue. They are particularly popular among athletes and bodybuilders for their potential benefits in enhancing performance and promoting muscle growth.