COSRX - The Niacinamide 15 Serum

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This serum contains 15% niacinamide and various synergistic ingredients to effectively treat acne-prone skin. Formula’s niacinamide regulates sebum production, smooths skin and improves the appearance of acne scars. Other ingredients include N-acetylglucosamine (NAG) to gently exfoliate skin and fade hyperpigmentation, zinc PCA to balance skin’s oil-water levels and allantoin to promote collagen production.


  • Combines the maximum concentration of 15% niacinamide with optimal ratios of synergistic ingredients for total acne control.
  • Helps diminish the appearance of congested pores.
  • Controls the production of sebum and oil.
  • Exfoliates and smoothens rough skin for a soft touch.

How to Use:

Smooth over cleansed, damp skin.


Water, Pentylene Glycol, Niacinamide(15%), Butylene Glycol, Acetyl Glucosamine, 1,2-Hexanediol, Zinc PCA, Trehalose, Xanthan Gum, Pullulan, Allantoin, Ethylhexylglycerin, Sodium Phytate, Citric Acid, Tocopherol

Size: 20ml

Additional Info:

  • Approved by Ministry of Health

Made in Korea