Cosrx AHA BHA Vitamin C Booster Serum - 30 mlBoost your glow. Refine your skin. COSRX AHA BHA Vitamin C Booster Serum is a powerful brightening and smoothing formula designed to gently exfoliate, improve skin texture, and enhance radiance. Combining AHA, BHA, and Vitamin C, this lightweight serum helps promote a clearer, more even looking complexion. Key Features AHA (Alpha Hydroxy Acid): Helps exfoliate the skins surface to improve texture and dullness. BHA (Beta Hydroxy Acid): Supports pore