Niacin is one of the B vitamins. It helps regulate vascular tone and can cause increased blood flow to the extremities - called a "flush" effect. This effect lasts only fifteen minutes or so.
Niacin over a period of time can lower blood pressure. It regulates fat and cholesterol metabolism and has some psychological effects to improve mental attitude and control depression.
Each capsule contains:Niacin (as niacin, USP) 500 mgvegetarian capsule, cellulose, silicon dioxide, magnesium stearae, carbomethylcellulose sodium