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Inositol Hexanicotinate500 mg Per CapsuleVitamin SupplementSupports Cardiovascular HealthFormulated to Eliminate the Natural Flushing Effects of NiacinPromotes Carbohydrate MetabolismScience-Backed Quality Since 1969Swanson Ultra Flush-Free Niacin delivers all the cardiovascular benefits of regular niacin with no unpleasant flushing sensation. It eliminates the natural flushing effect of niacin with a special form of vitamin B-3 known as inositol hexaniacinate.