We use superior science to make smarter formulas like Jarrow Formulas® Arginine-Citrulline Sustain. It is a synergistic combination of two amino acids plus vitamin C to support the vascular production of nitric oxide (NO) and promote blood flow and cardiovascular health. The formula is also suitable for men's health and sports and fitness benefits. *These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.