L-Arginine is a chemical building block called an amino acid. It is necessary for the body to make proteins. Arginine plays an important role in cell division, the healing of wounds, removing ammonia from the body, immune function, and the release of hormones.
The amino acid, L-Arginine, has several major functions in the body including as a precursor of nitric oxide. It plays a vital role in vasodilation, relaxation of smooth muscle cells within arterial blood vessels.
Also, the body uses more L-Arginine when it is under stress or injured. This suggests a role in immune function. Finally, L-Arginine is used by the body to produce creatine which supports muscle protein synthesis.