Niacinamide 15 Serum

COSRX Niacinamide 15 Serum is a high-concentration vitamin B3 serum for oily or combination skin with uneven-looking tone and texture. Its light serum format is appealing when you want a targeted step without an oily finish.

The 15% niacinamide is paired with zinc PCA, acetyl glucosamine and allantoin. Niacinamide can support barrier function and a more even-looking complexion, but much published evidence uses lower concentrations. Fifteen percent does not guarantee a better result for every skin, particularly if you are easily irritated.

I would consider this for someone who already tolerates niacinamide and wants focused care for excess shine or lingering marks after blemishes. Introduce a few times weekly, then increase only if comfortable. Follow with moisturiser and daytime sunscreen. Persistent acne or true scars need a different assessment; this serum is not an all-stage acne cure.

Suited for

• Oily or combination skin tolerating niacinamide.
• Uneven-looking tone and post-blemish marks.
• A targeted serum with a gradual introduction.