Arginine is an amino acid that can be taken as a supplement. It has been used for infertility and erectile problems, chest pain (angina), heart diseases, atherosclerosis (hardening of the arteries), lack of growth hormones, preventing blood closts, high blood pressure, frequent urinary tract infections, migraine headache, to assist in weight loss, diabetes, and to increase the body's ability to fight disease. Other names for Arginine include: L-Arginine. Check with your doctor before taking Arginine.