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.* This product has twice the L-Arginine (1,000 mg per tablet) as in NOW's regular strength product (500 mg per capsule). The L-Arginine used in this product is pharmaceutical grade. Natural color variation may occur in this product. • Conditionally Essential Amino Acid • Nitric Oxide Precursor*

Keep the bottle tightly closed at all times in between usage. Keep the freshness packet in bottle.Caution: For adults only. Consult physician if pregnant/nursing, taking medication, or have a medical condition. This supplement should be avoided by persons with glaucoma or herpes simplex unless otherwise prescribed by a physician. Do not use if you have had a myocardial infarction or have established coronary artery disease. Keep out of reach of children.Do Not Eat Freshness Packet. Keep in Bottle.Store in a cool, dry place after opening. Please Recycle.*This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.