Nitric oxide was proclaimed "Molecule of the Year" in 1992. Produced by nearly every type of cell in the human body, Nitric Oxide is one of the most important molecules for blood vessel health, while staying young and strong. It's a vasodilator, meaning it relaxes the inner muscles of your blood vessel walls, causing the vessels to widen. In this way, nitric oxide increases blood flow and lowers blood pressure, and helps the circulatory system deliver important nutrients to every part of the body.