Now Foods Vitamin B3 Niacinamide 500mg 100 CapsulesAssist in Energy ProductionWhat is Niacinamide? Niacinamide (Vitamin B-3) is a form of Niacin, a water soluble B-Vitamin. It is a derivative of Niacin that does not cause the "flush" normally associated with taking high doses of Niacin. Niacinamide ..