COSRX Refresh AHA BHA Vitamin C Booster Serum, 30ml – a lightweight, essence-like booster serum that combines gentle chemical exfoliation with antioxidant brightening to refine texture and reveal a clearer, glass-skin glow. Product contains: AHA (Alpha Hydroxy Acids) – gently exfoliates surface dead skin cells to enhance radiance and texture. BHA (Salicylic Acid) – penetrates pores to help clear congestion and reduce blackheads. Vitamin C – antioxidant brightening that helps even skin tone and fade dark spots. Product effects: gentle chemical exfoliation, unclogs pores and reduces congestion, brightens and evens skin tone, smooths and refines skin texture, promotes a healthy, glass-skin radiance. Recommended for: oily skin, combination skin, acne-prone or congested skin, dull or uneven skin tone,

After cleansing and toner, apply two to three drops to dry skin, avoiding eyes and lips. Start two or three evenings weekly and increase as tolerated. Follow with moisturizer. Do not combine in the same routine with other strong acids or retinoids; apply SPF daily.

Key ingredients: AHA, BHA, vitamin C derivatives, golden-rx complex, panthenol and hydrating humectants.