L-arginine

L-arginine is an amino acid, a building block of protein found naturally in the body. It plays a key role in producing nitric oxide, a molecule that helps relax blood vessels, promoting better blood flow. This can support cardiovascular health, improve exercise performance, and assist in healing wounds. L-arginine is available through foods like meat, dairy, and nuts, or as a supplement. While generally safe for many people, high doses may cause side effects or interact with medications, so it's best to consult a healthcare professional before use.