Cosrx (The Niacinamide 15) Serum

COSRX The Niacinamide 15 Serum is a high-strength Korean skincare serum formulated to control excess oil, minimize pores, reduce acne marks, and improve uneven skin tone. With a powerful 15% concentration of niacinamide, the serum helps balance sebum production while smoothing skin texture and promoting a clearer complexion.