L-arginine is one of many amino acids the body needs to function properly.
Like other amino acids, L-arginine plays a role in building protein. The body can use the protein to help build muscle and rebuild tissue.
In addition to building protein, L-arginine releases nitric oxide in the blood.
Nitric oxide acts to widen blood vessels in the blood stream, which may help aid certain circulatory conditions.
A person’s body naturally produces L-arginine under normal circumstances. People also get additional L-arginine as part of their regular diet.