Niacin is water-soluble Vitamin B and is part of the B Complex. Niacin is required for the metabolism of carbohydrates and protein into energy. Niacin supports cardiovascular health and promotes increased blood flow. The unique, inositol-bound niacin in Solgar No Flush Niacin 500mg allows for a gentle, no-flush delivery of niacin to the body. Solgar No Flush Niacin 500mg Vegetable Capsules does not produce flushing or the gastrointestinal discomfort which may be associated with Niacin use. Solgar No Flush Niacin 500mg Vegetable Capsules are free of corn, yeast, wheat, soy and dairy products and are formulated without the use of preservatives, artificial flavors or colors.