K-duck
Photo: Open Beauty Facts (CC BY-SA 3.0)
The 6 Peptide Skin Booster Serum
- Brand
- COSRX
- Category
- Skincare › Serums
About this product
COSRX The 6 Peptide Skin Booster Serum is a Korean skincare product in the Serums category. It features Peptides. K-duck tracks 11 COSRX products across its country rankings.
Key ingredients
- Peptides
- Short chains of amino acids used in skincare aimed at firmness and elasticity.
Highlighted in the product name.
What these ingredients are typically used for
- Fine lines & firmness
Rankings by country
Based on Google search interest (Jul – Sep 2026), this product appears in the Serums rankings of 5 of the 6 countries we track. Its best position is #4 of 12 in France.
- 🇫🇷 France · #4 Serums
- 🇺🇸 the US · #5 Serums
- 🇨🇦 Canada · #6 Serums
- 🇯🇵 Japan · #8 Serums
- 🇬🇧 the UK · #9 Serums
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.
