Effaclar serum contains a high concentration of exfoliating acids combined with soothing niacinamide to fight blackheads, spots, blemishes and visible pores. This no-rinse formula leaves skin clean and purified. Apply to the entire face in the evening after cleansing the skin with Effaclar Foaming Gel. A lightweight serum that absorbs quickly for ease and speed of daily use. It has a non-greasy and non-sticky finish. The serum is a perfect balance between the exfoliating effect and the soothing effect, opening the pores and reducing stubborn imperfections and blemishes from day to day.