COSRX AC Collection Acne Calming SetCOSRX 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 damage. 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