COSRX The Niacinamide 15 Serum 20mL
코스알엑스 더 나이아신아마이드 15 세럼 20ml
₩ is the Korean store price; $ is what Olive Young Global lists. They often differ because the pack size or count sold overseas isn't the same — check the size on the listing before you buy.
Not a cart — nothing is sold here. I check it against what you already use: clashing actives, doubling up, and morning vs night.
Fit with your routine
Add a few more to your routine and we'll flag any clashing actives or good pairings with this one.
About this product
Niacinamide gets all the hype for good reason, and COSRX bottles a serious 15% of it here alongside zinc PCA to help calm excess oil and refine the look of pores. Acetyl glucosamine and trehalose round things out to support brightening without stripping moisture. It's a lightweight, fragrance-free fluid that layers easily under the rest of your routine.
Bottom line: a straightforward, potent niacinamide serum for dullness and uneven tone. It's new on OY with reviews still rolling in, so consider it one to watch.
After cleansing, drop a small amount onto skin at the serum step and press in with fingertips, rolling from the center of the face outward until absorbed.
What reviewers say
This one's just niacinamide doing its job — 15%, fragrance-free, no filler drama. I lean on it more for soothing and brightening than deep hydration, so I usually layer something richer underneath. Combination skin like mine takes to it easily.
Asked which skin it worked for, 60% of reviewers picked combination (dry 20%, oily 20%).
45% called it gentle on their skin.
These add up to 100 — it's which answer people chose, not a score out of 100. It tells you who liked it, which isn't the same as what will suit you.
Ingredients
Key actives
What this product is working withDoes this fit what you already use?
Add it and I'll check it against the rest — clashing actives, doubling up, and which half of the day each one belongs in.
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