When your skin needs a little more help crystal clear oxygen serum provides a 10 day intensive skin rejuvenation treatment the serum contains unique ingredients to rejuvenate the skin facial lines and wrinkles are smoothed and the skin is brighter rejuvenated and hydrated a course of 5 serum tubes should be prescribed use one half each serum tube every evening professional tip due to the anti bacterial effects of the oxygen serum it makes it an excellent treatment for acne prone skins