L-arginine is an amino acid that plays a crucial role in the body. It is involved in the production of nitric oxide, a compound that helps relax blood vessels and improve blood flow. This makes L-arginine important for cardiovascular health and may support exercise performance. L-arginine can be obtained from various dietary sources, including meat, dairy products, nuts, and seeds. It is also available as a dietary supplement, often marketed for its potential benefits in enhancing athletic performance and improving overall health. However, it's essential to consult a healthcare professional before starting any new supplement.