COSRX The Niacinamide 15 Serum


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Size : 20ml / 0.67 fl. oz

Total acne care with 15% niacinamide

Highly concentrated serum that combines the maximum concentration of niacinamide with optimal ratios of synergistic ingredients for total acne control.

*Non-comedogenic tested -doesn't clog the pores.



  • Niacinamide :

Provides total acne care by controlling sebum production, soothing acne inflammation and diminishing post acne scars

  • N-Acetylglucosamine(NAG) :

Works in synergy with niacinamide to effectively fade hyperpigmentation

  • Zinc PCA :

Inhibits inflammation and promotes recovery of damaged skin

  • Allantoin :

Promotes collagen synthesis to facilitate skin regeneration



After cleansing, during the serum phase, apply a few drops to the skin. Use fingertips to gently massage and absorb the serum, starting from the center of the face working towards the edges.

* Highly concentrated serums should only be used in the evening? NO!

* This serum can be used in the morning and/or afternoon.

* If applied in the morning, be sure to use with a SPF of 30 or higher.


Clinical Results in 4 weeks

Suitable for acne prone skin use (Non-comedogenic

- 45.27% improvement of activated sebaceous glands

- 48.07% improvement of oil synthesis amount

- 42.72% improvement of number of blackheads

- 50% improvement of number of whiteheads

- 15.50% improvement of (hidden melasma and blemishes)

- 19.47% improvement of pigmentation (visible melasma and blemishes)

- 2.59% improvement of triple-complexion skin tone (brightness)

- 24.89% improvement of triple-complexion skin tone (redness)

- 11.73% improvement of triple-complexion skin tone (yellowness)


*Based on clinical trials of 20 subjects.

*Dermacosmetic Skin Science Laboratory Co., Ltd.


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