NOW Foods, Sports, L-Arginine Powder, 2.2 lbs (1 kg)

Pure, Free-Form Pharmaceutical Grade Non-GMO A Dietary Supplement GMP Quality Assured L-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.