Niacin is an essential vitamin for energy production and maintaining healthy sugar and fat metabolism. It's often used in energy boosting formulas, but in higher doses it has an even more valuable function. High levels of Niacin have been shown to block the breakdown and processing of fats by your body. This decreases bad cholesterol levels and leads to increased levels of good cholesterol. Twinlab Niacin B-3 has 1000mg to improve your cholesterol levels, and keep your heart healthy.