Recent Examples on the WebTetrahexyldecyl ascorbate, which tends to be more stable than its counterparts.Glamour, 9 June 2022 That's why Sunday Riley's new cream is infused specifically with THD ascorbate, a stabilized and potent form of the antioxidant. Jennifer Hussein, Allure, 29 Mar. 2022 The brand uses three different forms of vitamin C—ascorbic acid, 3-O-ethyl ascorbic acid and tetrahexyldecyl ascorbate—to energize and brighten the skin. Joseph Deacetis, Forbes, 23 Dec. 2021 For the uninitiated, the particular form of vitamin C in Sea Vitamin C Serum, THD ascorbate, is an extremely stable, oil-soluble form of vitamin C, according to cosmetic chemist Ginger King. Sarah Kinonen, Allure, 20 Aug. 2020 Another option is Sunday Riley C.E.O. Rapid Flash Brightening Serum, $85, which contains THD ascorbate, or our SELF Healthy Beauty Award winner, Vichy LiftActiv 15% Pure Vitamin C Serum Brightening Skin Corrector, $29, which contains ascorbic acid. Talia Abbas, SELF, 9 Oct. 2018 Our experts recommend keeping an eye out for a specific type of vitamin C, tetrahexyldecyl (THD) ascorbate, which is a stable form of ascorbic acid. Talia Abbas, SELF, 9 Oct. 2018 Also, some experts say that since THD ascorbate is stable, the formulation may last longer than vitamin C that is in active form. Talia Abbas, SELF, 9 Oct. 2018 Common derivatives, like ascorbyl palmitate and tetrahexyldecyl ascorbate, tend to be more stable than pure ascorbic acid but slower acting.Allure, 17 Aug. 2018 See More