Niacin Plays An Essential Role In The Activities Of Various Enzymes Involved In The Metabolism Of Carbohydrates And Fats, The Functioning Of The Nervous And Digestive Systems, The Manufacturing Of Sex Hormones, And The Maintenance Of Healthy Skin Suggested Use: 1 Tablet Daily With A Meal Well Made Supplement:Suitable For Vegetarians. Contains No Yeast, Dairy, Egg, Gluten, Soy Or Wheat. Contains No Sugar, Starch, Preservatives, Or Artificial Color, Flavor Or Fragrance Over 40 Years Of Trust. Source Naturals Was Created In 1982 By Ceo Ira Goldberg To Support Everyoneã¢ÂS Potential To Enjoy Optimal Health Manufactured In The Usa. Manufactured In Scotts Valley, Ca, Under The Good Manufacturing Practices (Cgmps) Established By The Us Food And Drug Administration. (Fda) 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 The Maintenance Of Healthy Skin