L-Arginine & L-Citrulline is an effective product for assisting workouts, lowering blood pressure and cholesterol, and regulating blood flow and energy.† Our heart pumps blood throughout the body; L-arginine helps increase nitric oxide synthesis, widens blood vessels, and improves circulation.† The heart relies on nitric oxide to keep your blood pressure and blood flow stable. Your blood pressure and heart health will benefit from the synergy of l-arginine and l-citrulline found in L-Arginine & L-Citrulline.† Support circulation † L-Arginine enhances the body's production of nitric oxide. Improved blood flow results from the dilation of blood vessels caused by this chemical.