Valine is an essential amino acid, meaning that the body cannot produce it on its own and must obtain it from food sources. It plays a crucial role in muscle metabolism, tissue repair, and maintaining nitrogen balance in the body. Valine is commonly found in protein-rich foods such as meat, dairy products, and legumes. In addition to its role in muscle health, valine is important for energy production and can help reduce fatigue during exercise. It is one of the three branched-chain amino acids (BCAAs), along with leucine and isoleucine, which are often used by athletes to enhance performance and recovery.