COSRX The Niacinamide 15 Serum is a powerful skincare solution containing 15% niacinamide combined with Acetyl Glucosamine and Zinc PCA. This concentrated formula helps control oil production, minimize pores, and regulate sebum for clearer, more balanced skin. Key features: • Contains 15% niacinamide concentration • Features Acetyl Glucosamine and Zinc PCA • Controls excess oil production • Minimizes appearance of pores • Regulates sebum production • Non-comedogenic formula • Suitable for acne-prone skin The serum comes in a 20ml black glass bottle with a dropper applicator for precise dispensing. Clinical studies have shown significant improvements in sebaceous gland activity, blackhead and whitehead reduction, and overall skin tone after 4 weeks of regular use. The formula is designed to be lightweight and fast-absorbing, making it suitable for daily use in both morning and evening skincare routines.