BCAA stands for branched-chain amino acids, which are essential nutrients that the body obtains from protein sources. The three main BCAAs are leucine, isoleucine, and valine. These amino acids are crucial for muscle growth, repair, and energy production, making them popular among athletes and fitness enthusiasts. BCAAs can be found in various foods, particularly in meat, dairy, and eggs. They are also available as dietary supplements, often taken before or after workouts to enhance performance and reduce muscle soreness. Research suggests that BCAAs may help improve exercise endurance and support recovery.