Its ingredients are Niacinamide 500mg microcrystalline cellulose lactose stearic acid talc croscarmellose sodium and silica. Niacinamide is the non-flushing form of Niacin (Vitamin B3). It is necessary for the normal breakdown of fats and the release of energy from carbohydrates.* Gluten & Preservative Free No Starch Sodium Soy Yeast Corn Artificial Colors or Flavors.