* Dietary Supplement * Timed-Release Niacin 500 mg * An FDA Regulated Facility * Potency and Quality Guaranteed Niacin is an essential B-Vitamin (B-3). Niacin is involved in the normal metabolism of fats and fat-like substances such as cholesterol. Niacin taken in a single 500 mg dose often causes flushing or itching. Carlson Niacin·Time is prepared to minimize or eliminate these unpleasant side effects by providing a gradual release of Niacin over a period of several hours.* *If flushing or itching occurs, drinking 1 to 2 glasses of water may alleviate symptoms.