Description
The research-based derma line of COSRX was born, a prescription solution that optimally blends customized high-efficiency ingredients to solve skin problems and delivers them safely and effectively to the skin.
This product is recommended for those who are concerned about blackheads/whiteheads, those who are worried about shine due to excess sebum, and those who are worried about rough skin texture due to dead skin cells.
It is an A-to-Z solution product that can take care of skin problems, from the roots to the traces.
Feel only the freshness by removing the greasy oil.
It is a liquid formula that is as light as water and is quickly absorbed to complete a smooth skin condition.
You can feel the four trouble care effects: sebum/oil care, pore care, dead skin care, and skin texture care.
COSRX is clean and earth-friendly, and it is easy to recycle with a dropper wiper that separates easily from the package.
Please dispose of the dropper head as general waste, the dropper cap and the dropper wiper as plastic, and glass tubes and containers as glass.
With an optimal combination of N_Acetylglucosamine, zinc P.A., and allantoin, the formulation helps to care for dead skin cells, remove sebum, and protect the skin.
*It is recommended to apply after toner and before cream.
High-content serums don’t only have to be used in the evening! It can also be used in the morning/afternoon.
When using as a morning care product, be sure to use a sunscreen with SPF 30 or higher to protect your skin and the ingredients.
Caution
*Due to the characteristics of the highly concentrated serum formulation, which has a high content of active ingredients, if the content spills while opening and closing the container and is continuously exposed to the air, the active ingredients may become visible.
*This is a normal phenomenon and there is no problem with the product, and it is safe to use.












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Rafael de Almeida from Curitiba, Brasil –
Quando vi o COSRX The Niacinamide 15 Serum, não tinha certeza se mais um produto seria a resposta para as minhas frustrações com pele oleosa e textura irregular. Testei inúmeras opções sem resultados realmente eficazes e minha esperança já estava baixa. Contudo, esse sérum me surpreendeu! Após algumas aplicações diárias, notei uma diferença significativa na aparência dos poros e até mesmo na redução da oleosidade que sempre esteve presente no meu rosto. A absorção é instantânea; ele deixa um toque leve enquanto cuida profundamente da saúde cutânea. Minha pele parece mais fresca e radiante agora — definitivamente valeu a pena dar essa chance!
Luz María Olivares from Mexico City, Mexico –
As someone living in vibrant Mexico City, where the air feels thick with cultural richness and occasional pollution, I’ve been on a quest for skincare that speaks to my urban lifestyle. COSRX The Niacinamide 15 Serum caught my eye not just because of its focus on pore minimization but due to the promise of fresh skin amidst humidity-induced sheen. Its watery consistency slips onto my face seamlessly and absorbs quickly—like it’s helping me shed yesterday’s bustle off without weighing me down. Compared to another popular brand here which felt heavy like putting honey on toast, this serum offers freedom instead of tackiness—a refreshing solution that’s kind to both surface shine and deeper blemishes.
桃田 美咲 from 日本・福岡 (verified owner) –
最初は本当に効くのかなと半信半疑でしたが、COSRXのナイアシンアミド15セラムを使ってみて、大きな変化に驚いています。皮脂分泌が気になる毎日なのですが、このセラムのおかげで肌が少しずつ整っていく感じがあります。特に黒ニキビや白ニキビに悩んでいた私には嬉しい結果です。この軽やかな液体はすぐになじむので、メイク前でも全然ストレスにならず、お昼までツヤ感も持続します。値段以上の効果だと思いました!
Nina Gabradze from Tbilisi, Georgia –
In the heart of bustling Tbilisi, my oily skin was tamed by COSRX. Blackheads? Gone! A must for anyone struggling with shine.