Our Niacinamide is used to treat pellagra. This is the result of niacin deficiency which is often caused by poor diet, alcohol abuse or long term use of certain medication. The offered product contains niacin which is a form vitamin B3. This product cannot be used as a substitute of niacin. The highly reliable product can effectively treat diarrhea, dementia, tongue swelling or red skin often caused by the deficiency of niacin.