Formulated with proprietary COSRX Centella AC-Rx Complex, the AC Collection Blemish Spot Clearing Serum not only treats acne, but also helps the skin recover without any irritation. This blemish-clearing serum can be used daily to clear acne and brighten skin. The triple blemish care system works to calm, brighten, and strengthen skin with CentellAC-Rx complex and 4% Niacinamide.