COSRX · Serums & Essences
The Niacinamide 15 Serum
Same names, same orderThe two labels agree on the first 15 names.
Fifteen names in the same order on both lists. The US list prints niacinamide at 15%; the Korean disclosure prints no amount and states the product is not a functional cosmetic.
US label
COSRX The Niacinamide 15 Serum20 mL · 0.67 fl ozwww.cosrx.com ↗ · read Sep 27, 2026 · 15 names
15on both labels
0only on the Korean label
0only on the US label
Names are matched after spacing and punctuation are removed; water and fragrance count as one name each however they are written. A Korean name is linked to its MFDS English name only by exact match.
Only here.
Korean label0
Nothing is listed on this label alone.
US label0
Nothing is listed on this label alone.
Both labels, in order. 15
| Ingredient | Korean label | US label |
|---|---|---|
| Water정제수Water | N°1 | N°1 |
| Pentylene Glycol펜틸렌글라이콜Humectant | N°2 | N°2 |
| Niacinamide(15%)나이아신아마이드Vitamin B3 | N°3 | N°3 |
| Butylene Glycol부틸렌글라이콜Humectant | N°4 | N°4 |
| Acetyl Glucosamine아세틸글루코사민Humectant | N°5 | N°5 |
| 1,2-Hexanediol1,2-헥산다이올Preservative support | N°6 | N°6 |
| Zinc PCA징크피씨에이Zinc salt | N°7 | N°7 |
| Trehalose트레할로오스Humectant | N°8 | N°8 |
| Xanthan Gum잔탄검Thickener | N°9 | N°9 |
| Pullulan풀루란Film former | N°10 | N°10 |
| Allantoin알란토인Comforting ingredient | N°11 | N°11 |
| Ethylhexylglycerin에틸헥실글리세린Preservative support | N°12 | N°12 |
| Sodium Phytate소듐파이테이트Stabilizer | N°13 | N°13 |
| Citric Acid시트릭애씨드pH adjuster | N°14 | N°14 |
| Tocopherol토코페롤Antioxidant | N°15 | N°15 |
Where the two labels agree, one row shows both positions. A row with one position is on that label only. Position is the place on the published label, most to least; it is not a concentration.
Sources and dates
- Korean label
- oliveyoung.co.kr ↗ · read Nov 3, 2026 · SHA-256 a1488649964d…
- US label
- www.cosrx.com ↗ · read Sep 27, 2026
- MFDS
- ingredient data ↗ · Sep 27, 2026
- Reviewed
- Nov 3, 2026
Olive Young Korea lists the responsible seller as (주)코스알엑스 and the manufacturer as (주)엔코스, made in Korea.
The Korean listing states the product is not a functional cosmetic (해당사항 없음).
Each market's ingredient list is copied as written from the cited page on the date given. Korean names are resolved to the MFDS English name by exact match of the registered Korean name; a name without an exact record stays unresolved and is never guessed or counted. A difference between the two lists is a difference between two published labels. It is not a laboratory test, a safety finding or a claim about what is in any particular package, and it can reflect a renewal date, a label revision or a market-specific formula.
View the Korean source text
정제수,펜틸렌글라이콜,나이아신아마이드,부틸렌글라이콜,아세틸글루코사민,1,2-헥산다이올,징크피씨에이,트레할로오스,잔탄검,풀루란,알란토인,에틸헥실글리세린,소듐파이테이트,시트릭애씨드,토코페롤
View the US source text
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
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