This amino acid is known for its ability to promote strength and endurance by maintaining the formation of nitric oxide in the body. Natural Factors L-Arginine provides 500 mg per capsule and may be helpful for a number of health concerns.

Studies show that regular supplementation with L-Arginine may help improve blood flow, blood viscosity, and reduce blood clot formation, improve erectile function and sperm mobility; stimulate natural production of growth hormone and strengthen immunity.