Inositol Hexanicotinate. Cardiovascular Support. Promotes Energy Metabolism. Gluten Wheat & Dairy Free. Suitable for Vegetarians. Niacin / Vitamin B3 is a water-soluble vitamin and is part of the B Complex. It is required for the metabolism of carbohydrates and protein into energy. Niacin supports cardiovascular health and promotes increased blood flow. The unique inositol-bound niacin in this formula allows for a gentle no-flush delivery of niacin to the body.