La Roche Posay Effaclar serum is a concentrate of exfoliating acids combined with soothing niacinamide, that targets blackheads, pimples, marks, and visible pores. This no-rinse formula leaves the skin refined and purified. The first ultra sensorial La Roche-Posay care to combine such a high concentration of synergic actives: 3 keratolytic acids to reduce imperfections and marks + niacinamide & Thermal spring water for a soothing, anti-redness effect and anti-recurrence proven efficacy. Specifically adapted and well-tolerated for acne-prone skin. Non-comedogenic. Tested on acne-prone skin. Avoid eye area. In contact with eyes, rinse thoroughly. Use in association with a daily photo-protection product (SPF > 15). Do not apply on open scars.