As an Amino Acid, L-Arginine acts as one of the building blocks for protein.But now latus research shows that L-Arginine not only supports the body’s efforts to regulate blood pressure, it enhances sexual function and boosts immune, heart and brain functions. Scientific studies have shown that taking l-arginine orally can improve the beneficial expansion of blood vessels, thereby allowing the blood to flow more freely through the cardiovascular system. This product also has a beneficial effect on the kidneys, helping them control salt levels in the body. See the links below for more details.