NOW Foods Sports, L-Arginine Powder, 1 lb (454 g)

• Amino Acids
• Pure Powder
• Protein Metabolism
• Nitric Oxide Precursor
• Informed Sport - We Test, You Trust
• A Dietary Supplement
• Steroid Free
• Vegan
• Kosher
• Non-GMO
• GMP Quality Assured
• Halal 
• 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.