Cos De Baha Niacinamide 20% + Zinc 4% Serum 30ml is a high-strength Korean serum combining 20% niacinamide and 4% zinc PCA to aggressively target enlarged pores, excess sebum, dark spots, and uneven skin tone. Lightweight, fast-absorbing, and built for oily, acne-prone, and combination skin types common in Bangladesh. One of the most cost-effective active serums available in the market. Buy online from koreanshopbd.com, COD available!