while you sleep increases the luminosity of the skin, illuminates it and gives it a healthier appearance during the night nourishes, revitalizes dull, lifeless and lifeless skin lightens the skin and evens out its overall tone has an extraordinary regenerating effect thanks to active oxygen has a rich and dense consistency Test results: As part of the efficacy study, 30 subjects participated in the test for the line OXY-TREAT Clarifying (210 test subjects in total) who used the cream for 30 days.