Medik8 C-Tetra is a lightweight, uplifting formula that stimulates the production of collagen and elastin to help reduce fine lines and wrinkles, as well as visibly brightening the complexion and balancing skin tone. Using a lipid-soluble form of vitamin C called tetrahexyldecyl ascorbate, the formula penetrates deep into skin to provide powerful antioxidant protection with minimal irritation. C-Tetra has been carefully crafted in a water-free formula to be 100% stable, which means that the vitamin C does not degrade over time. This ensures that your formula remains highly potent from the very first use to the final drop.
Vitamin E – A lipid-soluble antioxidant that is naturally present in the skin. Vitamin E protects the skin from free radicals and is regenerated by vitamin C for optimum power.
I think this is one of the best vitamin C serums I have ever used. I have extremely sensitive skin but have never had any irritation or discomfort from this product. I have definitely seen a difference in my skin which looks brighter, smoother and glows.