COSRX Niacinamide Boosting Serum 20mlCOSRX Niacinamide Boosting Serum 20ml Pore Tightening & Brightening Powerhouse The COSRX Niacinamide Boosting Serum is a concentrated, lightweight serum delivering 15% niacinamide to target multiple skin concerns simultaneously. Formulated without fragrance, this dermatologist trusted Korean serum is designed for all skin types especially oily, acne prone, and sensitive skin to visibly refine pores, regulate sebum, fade dark spots, and even out skin
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