GNC Niacin 500 mgGNC Niacin 500 mg (100 Vegetarian Tablets) GNC Niacin 500 mg is a high quality dietary supplement designed to support blood vessel health and energy metabolism. Each vegetarian tablet contains 500 mg of niacin (Vitamin B3), aiding in overall health enhancement. Product Features: Supports Blood Vessel Health: Niacin helps maintain healthy blood vessels and supports proper blood flow. Enhances Energy Metabolism: Niacin plays a crucial role in converting