what is nicotinic acid
Niacin (nicotinic acid) is a B vitamin that's used by your body to turn food into energy. Niacin also helps keep your nervous system, digestive system, skin, hair and eyes healthy.iacin is a B vitamin that may raise your HDL (good) cholesterol. But side effects might outweigh benefits for most people. Niacin, a B vitamin, has long been used to increase high-density lipoprotein (HDL) cholesterol â the good cholesterol that helps remove bad cholesterol from your bloodstream.