L-arginine is an amino acid your body uses to create proteins, glutamate, creatine, proline, urea, polyamines and nitric oxide. It’s found naturally in fish, poultry, red meat and dairy products.

L-arginine AAKG is a salt that combines the amino acid with alpha-ketoglutaric acid, which is found in the body and of great interest to bodybuilders who believe it helps with overall athletic output.