Niacinamide, a form of 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.* Niacinamide also supports cardiovascular health, promotes increased blood flow, and supports the health of the nervous system.* Niacinamide and niacin are different forms of vitamin B3.Niacinamide ismostly the preferred from of vitamin B3 because it doesn"t cause flushing, the sensation reported with use of niacin.