Niacin capsules with flushing by BulkSupplements.com is one of the selections from our vitamin supplements. Niacin is also known as Vitamin B3 and its an important vitamin and it's one of the eight B vitamins.* This product may cause flushing. Each capsule of this product contains 500mg of Vitamin B3, as Niacin form, and take about 1 capsule for a total of 500mg per serving. And, we sell it in 365 Count in gelatin capsules form stored in bottles. Each of the bottles supplies a 365 days or a full year. Our Niacin capsules, or Vitamin B3 capsules, are pure, natural and does not contain any fillers, additives, and artificial flavors. And our Vitamin B3 capsules are dairy free, soy free, yeast free, and no added sugar. All products by BulkSupplements.com are manufactured according to cGMP Standards to ensure the highest quality for manufacturing, packaging, labeling, and holding operations. We work with a third-party laboratory that test our products at multiple stages during production, from raw material to finished products, and ensures compliance, standards, and consistency.