Best Naturals, L-Arginine, 1000 mg, 120 TabsProduct Description ? Larginine is a conditionally essential basic amino acid that plays an important role in several important path ways, urea metabolism and excretion, synthesis of proteins, the production of creatine phosphate, dna synthesis, and the synthesis of nitric oxide, a secondary messenger involved in blood flow. Product Benefits Supports Healthy Blood Circulations. Supports Immune System. Supports Positive Benefits On Athletic