Neutrogena Stubborn Blackheads Acne Face Serum help to prevent clogged pores & remove blackheads. The lightweight blackheads serum is suitable for all skin tones and should be layered under moisturizer or makeup. Put on and leave on to melt away blackheads, visibly clearing clogged pores and helping to eliminate stubborn acne in as little 3 days. Designed for oily, acne-prone skin, this oil-free face serum visibly clears clogged pores to help eliminate stubborn breakouts and blackheads.