Vegan Natural Cruelty-free

The Niacinamide 15 Serum

$ 25.00

Out of stock


With a high concentration of 15% Niacinamide, this serum provides intensive acne care by controlling excess sebum, soothing inflammation, and tightening the pores. An optimal ratio of N-Acetylglucosamine(NAG), Zinc PCA, and Allantoin works in synergy with Niacinamide to target breakouts and blemishes at all stages to fade hyperpigmentation, balance the skin, and promote recovery of damaged skin. Its light, watery texture absorbs quickly, leaving the skin feeling refreshed.


Texture-Meter: Clear Color | Liquid Texture | Notable Scent 


  • 20 mL / 0.67 fl. oz
  • Hypoallergenic
  • Dermatologist tested
  • Paraben-Free
  • Sulfate-Free
  • Phthalates-Free

How To Use

After cleansing, during the serum phase, apply 2-3 drops to the skin. Use fingertips to gently massage and absorb the serum, starting from the inside of the face working towards the edges. * This serum can be used in the morning and/or afternoon. For daytime use, follow with an SPF of 30 or higher sunscreen.



Inner Beauty (Ingredients)

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

About This Brand

One of the most beloved k-beauty brands. Cosrx is known for its precise formulations and consistent performance thanks to a series of high-performing ingredients that drive results.

Customer Reviews

Based on 1 review
Interesting serum

I was looking for a new niacinamide serum to replace the one I’ve been using for ever. However, I gave this one 4 stars as it was a bit harsh on my sensitive skin. I don’t use it much because of this, but I would like to start using it more

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The Niacinamide 15 Serum

$ 25.00