NOW Foods, L-Arginine, 1,000 mg, 60 Tablets

Amino Acids Protein Metabolism Nitric Oxide Precursor Muscle Maintenance Informed Sport - We Test, You Trust A Dietary Supplement Steroid Tested Kosher Vegan Non-GMO GMP Quality Assured 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.