personally tried the cellnique sebum gel for 1year++ already and then stopped. its popular because it helps u get rid of your whitehead/blackhead in your facial skin. it guaranteed u in 7days u can feel them drop-off when u r cleansing your face with cleanser. ok i must say it worked. i can feel 'heads' when gently massaging my face. it also says help to reduce sebum so whiteheads would not grow. anyway i've already stopped using this cellnique sebum gel for half year. bcoz i felt the longer i use.. the lesser the effect and no oil reduction. when i was using i hav lots of blackheads at nose and whiteheads at other part of facial skin. it became useless to me already. so i sometimes go facial centre to give my skin a thorough cleaning. after stopping sebum gel.. the whiteheads on my skin reducing up to 90% already..