Product name: tetrahexyldecyl ascorbate

Description: Tetrahexyldecyl Ascorbate is a stable, oil-soluble form of Vitamin C, used in cosmetics, personal care products and anti-aging products because of its ability to increase collagen levels, reduce melanin production, brighten skin, and repair the effects of UV exposure and other environmental damage. It is also considered to be more potent than L-asorbic acid and other Vitamin C compounds, and has a higher rate of penetration (because it is lipid soluble, like human skin) than other derivatives; it also has a higher rate of conversion to vitamin C within the dermis.

According to Epilution.com, Tetrahexyldecyl Ascorbate also has the ability to stimulate the skin to produce glycosaminoglycans, natural moisturizers that allow skin to absorb moisture from the body itself.

Tetrahexyldecyl Ascorbate is considered a mild version of Vitamin C, and also remains stable in air and water for up to 18 months, allowing it to serve as a long-lasting antioxidant. Because this ingredient is effective in lower concentrations than traditional Vitamin C, it is less expensive for formulas, and has also been found to be gentler and work in some people who are resistant to ascorbic acid (Natural-Skin-Care-Info.com).