Dietary SupplementNutritional Health Sustained Release Vegetarian Formula Niacin (Vitamin B-3) is an essential B-group vitamin necessary for good health. Contains no: sugar, salt, starch, yeast, wheat, gluten, corn, soy, milk, egg, shellfish or preservatives. Vegetarian/Vegan Product. Sustained Release Formula.NOW® Niacin tablets are guaranteed full potency.WarningsNot to be used by pregnant/lactating women or those with liver problems, stomach ulcers or diabetes unless recommended by your healthcare practitioner.