Dietary Supplement. Vitamin C Supplement with Calcium. Non-Acidic to Teeth. Mild Taste in Water. Try in Juice! Dissolves Easily in Liquid. Hypoallergenic 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 for.