I wanted to find out the difference between niacin-aka-nicotinic acid and niacinamide-aka-nicotinamide. This quote explained at least one difference: Niacin is used for support for healthy cholesterol levels already within the normal range. Niacinamide is used for support for joint comfort, support for sugar balance and support for brain function, but does not support cholesterol balance. There may be more differences especially since the niacin flush that only comes from real niacin shows up in the exact areas not covered by bathing suits.