An amino acid your body converts toward nitric oxide, supporting blood flow.
L-Arginine is an amino acid, one of the building blocks of protein. Your body uses it to produce nitric oxide, a molecule that helps blood vessels relax and supports healthy circulation.
Because healthy blood flow plays a role in energy and physical performance, L-Arginine is a common ingredient in this category of formula.
HorsePeak Gelatin uses the HCl (hydrochloride) form of L-Arginine, included alongside five other named ingredients rather than as a stand-alone high-dose formula.