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COSRX - The Niacinamide 15 Serum

COSRX - The Niacinamide 15 Serum

10% OFF

6 total reviews

RRP: £28.00


Save: £3.00

💕 Why we love it! 💕

Combining niacinamide with a team of synergistic ingredients, this serum offers a comprehensive approach to managing acne-prone skin. Whether you're looking to diminish the impact of past acne scars or prevent future issues, CosRX The Niacinamide 15 Serum is your go-to solution for a calmer, clearer and more resilient complexion.


A standout-player in the highly competitive world of K-beauty, COSRX popularity spread by word-of-mouth through word-of-mouth rather than marketing. Founded with the simple mission of good, effective skincare ingredients with as little of the bad stuff as possible. Prioritising affordability and open communication with their customers over marketing - COSRX focuses their spending on ingredients and effectiveness rather than packaging and promotions.

COSRX does not test ingredients or products on animals.

Explore our COSRX offerings

Get your skincare right and everything else will follow. Discover the best Korean Skincare products that'll soothe your skin and get you glowing in no time. Let us help you find the K Beauty routine that’ll work for you.

Key Benefits:

  • Regulates Sebum Production: Niacinamide is renowned for its ability to balance natural oils, keeping your skin neither too dry nor too oily. This regulation is crucial for preventing future breakouts and maintaining a clear, matte complexion.
  • Smooths and Refines Skin Texture: Say goodbye to rough, uneven skin. Regular use of this serum smooths out skin texture, leaving you with a surface that’s soft to the touch.
  • Fades Scars and Hyperpigmentation: This formula incorporates N-acetylglucosamine (NAG) to not only tackle existing acne but also reduce the appearance of acne scars and dark spots, offering a brighter and more even skin tone.
  • Maintains Oil-Water Balance: With zinc PCA, this serum maintains the perfect harmony of moisture in your skin, preventing the dehydration that can often be mistaken for dryness in acne-prone skin.
  • Boosts Collagen Production: Allantoin isn’t just a soothing ingredient; it also encourages collagen production, promoting skin’s elasticity and reducing the appearance of fine lines.

CosRX The Niacinamide 15 Serum is not just a skincare product; it's a powerful ally for anyone struggling with the daily woes of acne-prone skin. Expertly formulated with an impressive 15% concentration of niacinamide, this serum is ready to take on the most stubborn skin issues and transform your complexion.



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

How to Use

After toning, dispense three to four drops onto clean hands and gently pat onto face to absorb.

Follow up with a moisturiser. Make sure to use an SPF of at least 30 if you apply this serum in the morning. 

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Customer Reviews

Based on 6 reviews
Tricia S.
Really Nice!

My skin has been so smooth since using this, I really love the formulation of it!

Lovely serum

Great serum if you need a Niacinamide boost in your skin care. No fillers, no frills just a nice dose of Niacinamide. It reduces acne scars which we could use
I do like the fact that it comes in a bigger bottle. This serum is also good for reducing hyperpigmentation and dark spots which is literally what is good for. Highly reccomend.

Can’t live without this!

I always have to have a niacinimide in my skincare routine and this one is definitely top tier. I have a super oily T zone and large pores and I feel like this product helps me keep them under control. I also love that this soaks into the skin nicely, has no scent, and isn’t harsh at all!