OverviewVitamin B3, also known as Niacin or nicotinic acid, is part of the B complex which primarily converts food into energy.
Update Date 2/2/2015
Updated by: Emily Wax, RD, The Brooklyn Hospital Center, Brooklyn, NY. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.