Effaclar Ultra Concentrated Serum from La Roche-Posay is designed for oily, blemish-prone skin and is also suitable for acne-prone skin. This serum features an effective and soothing formula that helps to clear the appearance of blemishes without drying out the skin. It also helps to control excess oil, clear and minimize the appearance of pores, and reduce the appearance of marks and imperfections. The serum is available in a 30ml size.