Niacin is a B Vitamin. It’s B3 and has many useful functions. Niacin is essentially a vaso-dialator that opens the blood vessels to allow improved blood flow to organs, tissue, and cells. It’s been shown to reduce cholesterol and triglycerides from the blood, thus reducing the risk for heart attack. The recommended dosage for this effect is between 1000-2000 mg per day. Time released tablets are best. Ideally take one 750 mg tab in the morning and the second at night. Below are some other benefits of taking this supplement versus being on big pharma meds with serious side effects.