* Since 1947 * Free Form * Supports Heart Health * Nitric Oxide Stimulator * Gluten, Wheat & Dairy Free * Suitable for Vegetarians * Dietary Supplement * Kosher Parve L-Arginine is an amino acid that promotes heart health. It stimulates nitric oxide, a compound involved in circulatory and immune function. Nitric oxide degrades very rapidly after its formation. L-Arginine serves as the precursor for continued nitric oxide production. This product provides Free Form L-Arginine to promote optimal absorption and assimilation.