Eucerin DermoPure Triple Effect Serum with patented Thiamidol enables you to finally beat blemishes and post-acne marks with 3 key factors: Anti-marks: Patented Thiamidol acts at the root cause of hyperpigmentation to reduce persistent post-acne marks and prevent their appearance. Anti-blemish: Salicylic Acid effectively reduces blemishes and Licochalcone A helps to prevent new blemishes from appearing. Anti-shine: Sebum Regulating Technology delivers a long-lasting dry, matt finish.