COSRX The Niacinamide 15 Serum 20ml is a concentrated Korean brightening serum delivering 15% niacinamide to visibly fade dark spots, minimize pores, control sebum, and even out skin tone. Lightweight, fast-absorbing, and formulated with niacinamide-enhancing ingredients for maximum efficacy. Suitable for oily, combination, and acne-prone skin types common in Bangladesh. One of the most trusted niacinamide serums from a globally recognized Korean brand. Buy online from koreanshopbd.com, COD available!