Each serving of Life Extension(R) Vitamin B3 Niacin delivers 500 mg of this valuable B vitamin. Niacin, also known as vitamin B3, may be best known for the role it plays in promoting healthy cardiovascular function; but it also supports vision health and healthy lipid metabolism.<br/><ul><li><p>Promotes cardiovascular health&nbsp;</p></li><li><p>Supports&nbsp;healthy lipid metabolism&nbsp;</p></li><li><p>500 mg of niacin per serving</p></li><li>Gluten Free, Non-GMO</li></ul>