Stable form of vitamin C that is considered an analogue of L-ascorbic acid. Unlike pure vitamin C (ascorbic acid) tetrahexyldecyl ascorbate is lipid (fat) soluble. Some researchers believe this form of vitamin C has greater affinity for skin, as its fatty acid component helps aid penetration and protect the vitamin C component from rapid oxidation. This form of vitamin C has been shown to stimulate healthy collagen production and reduce wrinkle depth (Source: Dermatologic Surgery, March 2002, pages 231-236). See vitamin C , L-ascorbic acid