Life Extension, NitroVasc Boost Berry Flavor, 78.60 GramsProduct Description Nitrovasc boost combines an innovative source of arginine with polyphenols form the aronia berry to promote healthy vasodilation and circulatory health. This tasty drink mix encourages endothelial nitric oxide (NO) production in your vascular endothelium, the delicate inner lining of your blood vessels that is responsible for the healthy function of your vital arteries and veins. L arginine is an amino acid that can be made into