Now L-Arginine 1000 mg, Double Strength, 120 TabletsNow LArginine Double Strength provides 1000 mg of LArginine per tablet, with a total of 120 tablets per bottle. LArginine is a conditionally essential amino acid that plays a crucial role in urea metabolism and excretion. It is also involved in DNA synthesis and protein production. As a precursor to nitric oxide (NO), LArginine contributes to the dilation of blood vessels, which can support cardiovascular health by potentially reducing blood pressure.