Supports cardiovascular healthPromotes nitric oxide productionSuitable for everyday wellness seekersFree of gluten, dairy, soy, and nuts L-arginine is a free-form amino acid that your body converts into a chemical called nitric oxide. Nitric oxide is a vasodilator that promotes the relaxation of blood vessels, circulation, and heart health. While l-arginine is found naturally in red meats, chicken, fish, and dairy, sometimes our diet alone misses the mark. But don't worry, we're here to help. Taken once daily, The Vitamin Shoppe brand L-Arginine capsules support cardiovascular health and nitric oxide production with 500mg of l-arginine per daily serving.