Why it belongs in your routine
Targeted care, made simple
COSRX Advanced Niacinamide 15% Serum is a concentrated Korean serum formulated with 15% niacinamide, zinc PCA and acetyl glucosamine. Its lightweight texture is designed for experienced routines focused on the appearance of excess shine, visible pores and uneven-looking tone.
Best for: Oily or combination skin and experienced niacinamide users. Sensitive or new users may prefer a lower-strength formula.
Key benefits
- Helps balance the appearance of excess oil and shine
- Supports a smoother, more even-looking complexion
- Helps reduce the appearance of visible pores and post-blemish marks
- Lightweight texture layers beneath moisturiser and sunscreen
Key ingredients
- Niacinamide 15%: A concentrated form of vitamin B3 used for barrier support and uneven-looking tone.
- Zinc PCA: Commonly included in formulas designed for oily-feeling skin.
- Acetyl glucosamine: Complements niacinamide in tone-focused skincare.
- Allantoin: Helps support a comfortable-feeling formula.
How to use COSRX Niacinamide 15%
- Apply after cleansing and toner, if used.
- Use a small amount and avoid the immediate eye area.
- Follow with moisturiser.
- Finish with broad-spectrum sunscreen in the morning.
Begin two or three times per week and increase gradually according to your skin's comfort. Avoid layering several high-strength active products when first introducing the serum.
Build a balanced routine
Compare lower and higher-strength formulas in our niacinamide skincare collection, read the complete niacinamide guide, or browse more products in the COSRX skincare range.
Frequently asked questions
Is 15% niacinamide suitable for beginners?
It is a high-strength formula. Beginners or sensitive skin may prefer a lower concentration before deciding whether a concentrated serum is necessary.
Can it be used every day?
Some experienced users may use it daily, but it is sensible to begin less frequently and increase only when the skin remains comfortable.
Can niacinamide be combined with acids or retinoids?
It can appear in routines containing other active ingredients, but introducing several strong products together makes irritation difficult to identify. Alternate usage days initially if needed.
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Good to know
Patch test first
Skin is individual. Introduce one new product at a time, follow the label, and discontinue use if irritation occurs.