Niacin, also referred to as vitamin B3, is one of eight B vitamins that play a role in converting the food you eat into usable energy. Niacin also helps create and repair DNA, according toCleveland ...

Dear Dr. Roach: I am a woman in my late 60s with a family history that includes an older brother who had a heart attack at a young age. My total cholesterol has hovered around 200 mg/dL for many years ...