The COSRX The Niacinamide 15 Serum is a high-concentration brightening serum formulated with 15% Niacinamide to target uneven skin tone, dark spots, and dullness. Enriched with Hyaluronic Acid for hydration and soothing ingredients for sensitive skin, it helps to refine skin texture, minimize pores, and restore a radiant, smooth complexion. Ideal for all skin types, especially for those looking to improve brightness and clarity.