The Niacinamide 15 Serum 20 ml – Intensive Brightening & Acne-Control Serum with 15% Niacinamide and Zinc PCATransform your skin with the COSRX The Niacinamide 15 Serum, a high performance Korean treatment designed to target acne, excess oil, and uneven tone. Formulated with a potent 15% concentration of Niacinamide, it works to refine pores, fade dark spots, and strengthen the skin barrier for a clearer, brighter, and smoother complexion. Key Benefits: Contains 15% Niacinamide (Vitamin B3) to reduce breakouts, control sebum production, and even out skin