Medik8 CE-Tetra® Four times more activity than regular vitamin C, this highly stable lipid-formula has no skin irritation and penetrates in seconds. Once absorbed it cannot be washed off. Contains 7% Tetrahexyldecyl Ascorbate and natural vitamin E for enhanced 'network antioxidant' activity. Enhances sunscreen protection against free-radical damage. Designed for both men and women in their 40s onwards.
Regular vitamin C is very unstable and many typical vitamin C products are inactive by the time they are used on the skin, in some cases, they have become pro-oxidant and actually generate free radicals! Ground-breaking stability data on CE-Tetra guarantees real vitamin C activity and best of all, unlike L-ascorbic acid (regular vitamin C), C-Tetra will not exfoliate or irritate skin.

CE-Tetra® contains 7% Tetrahexyldecyl Ascorbate, the most potent and highly stable derivative of vitamin C available. CE-Tetra has been shown to have upto 4 times the potency L-ascorbic acid and other derivatives such as MAP (magnesium ascorbyl phosphate).

Additionally, CE-Tetra® contains PP-2 (Polyolprepolymer-2) for enhanced penetration.