Serum roundup
The best GHK-Cu serums, tested
Copper tripeptide-1 serums that balance an evidence-aligned formula with real, everyday usability.
By Mara Ellison, Cosmetic Chemist & Beauty Science Editor
· 2026-07-23 · 9 min read
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GHK-Cu — copper tripeptide-1 — is the flagship copper peptide, and it is the one people specifically search out. We tested the serums that lead with GHK-Cu and ranked them on how well the formula is disclosed, how it feels, and whether the price is fair. New to the ingredient? Read the GHK-Cu guide first.
What makes a good GHK-Cu serum
We want the peptide named clearly, a sensible supporting formula (humectants help, heavy fragrance does not), and a texture that layers under sunscreen. As always these are SerumScience editorial scores from hands-on use, described in how we test.
Our ranked picks
#1
Best overall
NIOD Copper Amino Isolate Serum 3:1
4.7 / 5
The most GHK-Cu-forward serum on test. If copper tripeptide-1 is specifically what you want, this is the cleanest expression of it.
Pros- Copper-peptide focus done well
- Fast absorption
- Transparent about what it is
Cons- Premium price
- Very minimalist
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#2
Best all-rounder
Paula's Choice Pro-Collagen Multi-Peptide Booster
4.5 / 5
A multi-peptide booster you can mix into moisturiser or layer alone. Flexible, fragrance-free and reliably formulated.
Pros- Versatile — mix or layer
- Fragrance-free, well-formulated
- Good supporting peptides
Cons- A blend, not GHK-Cu only
- Mid-to-high price
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#3
Best value
The Ordinary Multi-Peptide + HA Serum
4.3 / 5
The accessible multi-peptide serum that makes a fine, low-risk way to try copper-adjacent peptides without overspending.
Pros- Very affordable
- Lightweight and fragrance-free
- Easy to layer
Cons- Not a dedicated GHK-Cu serum
- Mild tackiness on application
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Cosmetic & informational only. SerumScience covers topical cosmetic skincare. Nothing here is medical advice, diagnosis or treatment, and we do not cover injectables or dosing. Any before/after or product imagery is representative. Patch-test new products and consult a qualified professional for skin concerns.
Frequently Asked Questions
Is a GHK-Cu serum the same as a copper peptide serum?
GHK-Cu is one specific copper peptide (copper tripeptide-1). A 'copper peptide serum' may lead with GHK-Cu or use a broader blend. Check the ingredient list to see which you are buying.
When will I see results from a GHK-Cu serum?
Cosmetic changes are gradual. Give a serum 8–12 weeks of consistent use before judging it.
Can I use GHK-Cu serum morning and night?
Most are formulated for daily leave-on use. Many people separate copper peptides from direct vitamin C by using them at different times of day.