Christian Dior One Essential Skin Boosting Super Serum regenerates and boosts the skin every day. Faced with UV rays, stress and pollution, our skin is attacked every day. The solution: the new One Essential with its even more powerful formula, targeting 100% external1 and, for the first time, internal2 toxins3. With a single dose4, the skin is freed of toxins, regenerates itself and finds its original appearance.