Product Overview: The Cosrx Niacinamide 15 Serum is formulated to brighten skin, minimize the appearance of pores, and control excess oil, delivering a smooth and balanced complexion. Key Features: ‣ 15% niacinamide: Effectively targets hyperpigmentation and uneven tone. ‣ Acetyl glucosamine: Enhances skin hydration and promotes smoothness. ‣ Zinc PCA: Controls sebum production and supports acne-prone skin.