Copper Peptide (GHK-Cu): what it is in skincare
⚡ Quick answer: A copper-bound peptide that supports the look of firmer, smoother skin and helps maintain a healthy barrier.
A copper-bound peptide that supports the look of firmer, smoother skin and helps maintain a healthy barrier.
What it does
Function: peptide (signal). Peptides are signal ingredients formulated to support a firmer, bouncier-looking complexion — a fast-growing K-beauty category.
How to spot it on a label
On a Korean product's INCI list, look for Copper Peptide (GHK-Cu). Ingredients are listed high-to-low by amount, so its position hints at how much is in the formula. See all peptides →
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Palmitoyl Tripeptide-1Palmitoyl Tripeptide-5Matrixyl (Pal-KTTKS)Argireline (Acetyl Hexapeptide-8)Acetyl Tetrapeptide-5SYN-AKE Peptide✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed 2026-06-21.
General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.