L-Arginine is an amino acid that has been shown to support the cardiovascular system and promote vigorous heart function. It is an important factor in muscle metabolism and works to transport, store, and excrete nitrogen. It is required in the formation of Nitric Oxide (NO) to enhance healthy circulation throughout the body. Natural Factors amino acids are the highest-quality pharmaceutical-grade products available.

Each capsule contains: L-Arginine (hydrochloride)|500mg Non-medicinal ingredients: Rice starch, vegetarian capsule (carbohydrate gum [cellulose], purified water, silica), vegetable grade magnesium stearate (lubricant).

Take 1 to 4 Capsules, 3 times daily or as directed by healthcare practitioner. Keep out of reach of children. * Do not use if pregnant or breastfeeding.

Wu, Guoyao, and Cynthia J. Meininger. "Arginine nutrition and cardiovascular function." The Journal of nutrition 130.11 (2000): 2626-2629. http://jn.nutrition.org/content/130/11/2626.full Niittynen, Leena, et al. "Role of arginine, taurine 4 and homocysteine in cardiovascular diseases." Annals of medicine 31.5 (1999): 318-326. http://informahealthcare.com/doi/abs/10.3109/07853899908995898