COSRX has developed its own unique centella complex named CentellAC-RX formula. After years of experimenting, COSRX CentellAC-RX formula has been perfected to optimize the efficacy of the natural centella ingredient which not only treats acne but also heals the damages that have already been made to the skin. This special formula allows the skin to return to its healthy state through a new methodical approach to solving acne related concerns such as controlling excessive sebum and balancing skin's natural pH level. This formula not only treats acne, but also helps revitalize and recover the skin without any irritation through COSRX Centella AC-Rx Complex. The calming formula includes three legendary healing ingredients–Madecassic acid, Asiaticoside and Asiatic acid. An upgrade version of Natural BHA Skin Returning A-Sol. This version is an Alcohol-free treatment – Total Gentle Care from Cause of Acne. Recommended for sensitive skin or anyone who wants to prevent acne or deals with acne occasionally. Made as an alcohol-free liquid, it helps the skin maintain the oil-moisture balance and calms irritation.