Eucerin DermoPurifyer Triple Effect Serum-40ML Reduces persistent post-acne marks and prevents their appearance, effectively reduces blemishes and prevents new ones from appearing and delivers a long-lasting, dry, matt finish. Key Components Thiamidol Salicylic Acid Licochalcone A Indication Anti-marks, anti-blemish, anti-shine. How to use Apply morning and evening one full pump to thoroughly cleansed skin all over your face. Avoid eye area.