In a prospective, double blind trial, l-arginine supplementation supported healthy endothelial function in blood vessels of male volunteers.
Arginine is contra-indicated for individuals with the herpes virus. l-Arginine is a safe, versatile amino acid precursor of nitric oxide associated with promoting cardiovascular health, immune support, sexual function, and memory.Because of its effect on nitric oxide production, l-arginine is theoretically best avoided by individuals with migraines, depression, autoimmune disorders, and kidney or liver disease. Arginine plays a role in the synthesis of hormones such as insulin and growth hormone, and has demonstrated the potential to support glucose metabolism and growth hormone production respectively.