* Dietary Supplement * Supports Healthy Immune Function * Gluten Free * Citrus Free * Preservative Free * Potency & Quality Guaranteed * An FDA Regulated Facility Vitamin C is an essential antioxidant nutrient. It is necessary for the building of collagen, maintaining teeth and gum tissue health, and normal functioning of the body"s natural defenses. Carlson Mild•C Crystals is pure Calcium Ascorbate, a buffered form of Vitamin C. There is evidence that the acidity of the ascorbic acid form of Vitamin C may irritate sensitive stomachs and may harm teeth. Calcium Ascorbate is a non-acidic form of Vitamin C that is mild in the stomach and gentle to the teeth. Mild•C Crystals is usually well-tolerated by food sensitive individuals as this product consists solely of high-quality Calcium Ascorbate - no free ascorbic acid is present.