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Inositol HexanicotinateCardiovascular Health500 mg Per CapsuleVitamin SupplementSupports Cardiovascular HealthFormulated to Eliminate the Natural Flushing Effects of NiacinPromotes Carbohydrate MetabolismScience-Backed Quality Since 1969Swanson Ultra Flush-Free Niacin eliminates the natural flushing effect of niacin with a special form of vitamin B3 known as inositol hexanicotinate. It delivers all the cardiovascular benefits of regular niacin with no unpleasant flushing sensation. Each capsule contains 500 mg of niacin from inositol hexanicotinate.