K-duckThe Vitamin C 23 Serum
- Brand
- COSRX
- Category
- Skincare › Serums
About this product
COSRX The Vitamin C 23 Serum is a Korean skincare product in the Serums category. It features Vitamin C. K-duck tracks 11 COSRX products across its country rankings.
Key ingredients
- Vitamin C
- An antioxidant used for dullness and dark spots. Best paired with daily sunscreen.
Highlighted in the product name.
What these ingredients are typically used for
- Dullness & dark spots
Rankings by country
Based on Google search interest (Jul – Sep 2026), this product appears in the Serums rankings of 3 of the 6 countries we track. Its best position is #4 of 12 in France.
Ranked by Google search interest in France · Jul – Sep 2026
Serums: how to use them
Serums (or ampoules) are concentrated treatments for a specific concern such as dryness, dark spots or redness. Use a few drops after toner or essence and before moisturizer. If you use more than one, apply the thinnest texture first.
