Niacin (Vitamin B-3) is an essential B-vitamin necessary for good health. Many Niacin supplements cause a temporary Niacin flush or tingling red rash on the skin when taken in large doses. This flush-free Niacin if formulated to avoid such reactions. Inositol Hexanicotinate is a stable, non-flushing source of Niacin. This superior source of Niacin works to reduce the common "niacin-flush" problems associated with high doses of Niacin supplements.