Reduces sebum levels without drying. Increased sebum production results in skin taking on an oily appearance. For people with moderately oily skin, Cetaphil Oily Skin Cleanser, used twice daily for two weeks was shown to reduce sebum levels by up to 60% without over drying skin. (Data on file, Galderma Australia Pty Ltd.) It removes oil, dirt, skin debris and makeup with a mild lathering action, leaving the skin clean and oil free without the tightness that sometimes follows. It does not clog pores and can be used in conjunction with acne medications. Removes oil without affecting skin barrier function. Skin acts as a barrier, keeping moisture in so it is important that a cleanser works without compromising it. Used twice daily for two weeks, Cetaphil Oily Skin Cleanser was shown to maintain the barrier function of the skin by not increasing water loss.