Buffered Vitamin C Dietary Supplement Immune Support Antioxidant Optimal Wellness Gluten-Free Citrus-Free Potency & Purity Guaranteed An FDA Regulated FacilityCarlson - Providing the highest quality nutritional supplements since 1965.Vitamin C is an essential antioxidant needed for building collagen, maintaining teeth and gum tissue health, and supporting our body's natural defenses. Mild-C contains a non-acidic form of vitamin C that's mild in the stomach.