Niacin is a vitamin available both as non-prescription nutritional supplements and as prescription medications. It is most often used for improving cholesterol levels but may be effective for other uses as well. It is thought that niacin works by preventing the liver from removing HDL, decreasing the liver's production of LDL, and reducing the release of fatty acids into the bloodstream. The vitamin comes as tablets or capsules and is available in immediate-release, slow-release, controlled-release, and extended-release forms.
(Click Niacin to learn more about the benefits of niacin, for general dosing guidelines, and to find out what side effects may occur with this vitamin. You can also click on the various links in the box to the right to access specific topics on niacin.)