NOW Foods Sports Nutrition, L-Arginine Powder, Nitric Oxide Precursor, Amino Acids, 2.2-Pound
NOW L-Arginine is pharmaceutical grade. Arginine is a conditionally essential basic amino acid involved primarily in urea metabolism and excretion, as well as in DNA synthesis and protein production.* It is an important precursor of nitric oxide (NO) and thus plays a role in the dilation of blood vessels.* Natural color variation may occur in this product.