Copper Peptide (GHK-Cu) vs EGF-type Oligopeptide: which Korean skincare ingredient?
Copper Peptide (GHK-Cu) vs EGF-type Oligopeptide: Copper Peptide (GHK-Cu) leans toward anti-ageing & firmness, while EGF-type Oligopeptide targets anti-ageing & firmness. Can you use both? Yes — they layer well together.
| Copper Peptide (GHK-Cu) | EGF-type Oligopeptide | |
|---|---|---|
| What it is | The distinctive blue serum. Copper peptides are widely used but formulation-sensitive — direct acids and pure vitamin C in the same layer can destabilise them, which is why they are usually kept to their own step. | Sold in Korea as sh-Oligopeptide-1 and heavily marketed. Read the claims carefully: cosmetics are regulated on appearance, and a topical peptide is not the same thing as a clinical growth-factor treatment. Treat it as a conditioning peptide whose independent evidence is thin — almost all the published support comes from the companies selling it. |
| Best for | Anti-ageing & firmness, Loss of firmness & elasticity, Post-acne marks (PIE & PIH) | Anti-ageing & firmness, Loss of firmness & elasticity |
| When to use | PM | PM |
Which should you choose?
Choose Copper Peptide (GHK-Cu) if your priority is Anti-ageing & firmness; choose EGF-type Oligopeptide for Anti-ageing & firmness. Many Korean routines use both — yes — they layer well together.
Copper Peptide (GHK-Cu) guide →EGF-type Oligopeptide guide →
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✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed: 2026-08-23.
General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.