About this product
COSRX The Niacinamide 15 Serum 20ml contains 15% niacinamide — a clinically proven concentration for maximally fading dark spots, minimising pores, and regulating sebum. The serum is best suited for experienced niacinamide users and those with significant hyperpigmentation or oiliness.
Best for oily, combination, all skin looking to address acne, excess oil, pores — with a focus on sebum control + pore care.
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Quick Stats
Key Ingredients
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Product Claims
Common Allergens
Based on confirmed product attributes. Always check the full ingredient list for personal allergens.
Always check the full ingredient list if you have known allergies or sensitivities.
How to Use
- 1Apply to clean, dry skin
- 2Follow with moisturizer
- 3Use AM and/or PM
Dermatologist Note
15% niacinamide + zinc PCA clinically reduces sebum by up to 50% in 4 weeks.
Based on published clinical literature and dermatological research.
Ingredient Analysis
Full Ingredient List (INCI)
3 ingredientsListed in order of concentration (highest first)
Niacinamide (15%), Zinc PCA, Acetyl Glucosamine
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Disclaimer: The information on this page is for informational purposes only and does not constitute medical or dermatological advice. Always do your own research, consult a qualified professional if you have concerns, and patch test new products before full application — especially if you have sensitive or reactive skin.