Vitamin B3, also known as Niacin or nicotinic acid, is part of the B complex which primarily converts food into energy.
Review Date: 3/14/2009 Reviewed By: Linda Vorvick, MD, Family Physician, Seattle Site Coordinator, Lecturer, Pathophysiology, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.