Buffered Vitamin C Dietary Supplement Supports Healthy Immune Function Gluten-Free Sugar-Free Citrus-Free Potency & Purity Guaranteed Vitamin C is an essential antioxidant nutrient needed for the building of collagen, maintaining teeth and gum tissue health, and the normal functioning of the body's natural defenses. Carlson Mild-C capsules contain a non-acidic form of vitamin C that is mild in the stomach.