Flush-Free Niacin B-3 For Energy & Cardiovascular Health Suitable For Vegetarians Gluten Free, Vegetarian Niacin Plays An Essential Role In The Activities Of Various Enzymes Involved In The Metabolism Of Carbohydrates And Fats, The Functioning Of The Nervous System And Digestive Systems, The Manufacturing Of Sex Hormones And Cholesterol, And The Maintenance Of Healthy Skin. Inositol Hexanicotinate Functions As Niacin Without The Characteristic "Flush." Free Of Gluten