COSRX Refresh AHA BHA Vitamin C Booster Serum is a lightweight, fast-absorbing serum designed to revitalize dull skin. Infused with AHA and BHA, it gently exfoliates to remove dead skin cells and unclog pores, while Vitamin C brightens and evens out skin tone. This serum boosts hydration, enhances skin clarity, and supports a radiant complexion. Suitable for all skin types.