A patented form of natural vitamin C, both oil- and water-soluble, clinically shown to retain its potency longer than other forms. While ordinary vitamin C degrades quickly in skin care products, Ester-C? Topical is stable and delivers the full benefit of this powerful antioxidant, penetrating into deep layers of the skin to promote collagen production. (Ester-C? is a registered trademark of Inter-Cal Corporation.)
