Branched-Chain Amino Acids, or BCAAs, are essential nutrients that the body obtains from protein sources. They include three specific amino acids: leucine, isoleucine, and valine. These amino acids play a crucial role in muscle growth, repair, and energy production, making them popular among athletes and fitness enthusiasts. BCAAs can be found in foods like meat, dairy, and eggs, as well as in dietary supplements. They are often used to reduce muscle soreness, improve exercise performance, and prevent muscle breakdown during intense workouts. However, it's important to maintain a balanced diet to ensure adequate intake of all essential amino acids.