COSRX The Niacinamide 15 Serum 20mlCOSRX The Niacinamide 15 Serum is a highly concentrated formula containing 15% niacinamide, blended with Acetyl Glucosamine and Zinc PCA to provide comprehensive acne care. COSRX niacinamide serum has lightweight texture that allows for quick absorption, effectively targeting excess oil, uneven skin tone, lack of radiance, and rough skin texture. This optimal combination of ingredients helps to minimize pores, refine skin texture, and brighten the