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 play a crucial role in maintaining muscle mass and overall health, particularly for athletes and active individuals.