Amino Acid</br>Conditionally Essential Amino Acid</br>Pharmaceutical Grade (USP)</br>Stimulates the production of nitric oxide which supports vasodilation</br>Contain no preservatives?? diluents?? or artificial additives</br></br>Product Description</br></br>L-Arginine is a conditionally essential basic amino acid involved primarily in urea metabolism and excretion?? as well as DNA synthesis.*</br><br/>http://www.amazon.com/gp/product/B0013OVX58