Exfoliating Serum for Oily Skin A lightweight, non-greasy serum that meets the needs of combination/oily or acne-prone skin, treating both teenage and adult acne, as well as hormonal acne, regardless of age. The Blemish Control Serum is an exfoliating serum for daily use that gently and deeply removes impurities and excess sebum, removes dead cells, cleanses the pores of the skin and keeps them clean while reducing irritation, scars and the appearance of the pores. The ideal balance between exfoliating and soothing action! 4 drops are enough to see your skin smoother, brighter and cleaner, without blemishes.