Niacin, aka Vitamin B3, is a water-soluble B-Complex vitamin. The term niacin refers to both nicotinic acid and nicotinamide, aka niacinamide; both of these are used to form the coenzymes NAD and NADP which support biological reduction-oxidation reactions. Niacin is an important vitamin that every part of your body needs. It may help lower cholesterol, improve joint mobility, and boost brain function.
