What do copper peptides do for your skin?
A systematic review concludes the human evidence is thin: the randomized trials are mostly small and use facial creams, so there is no firm answer on what copper peptides do for skin.
Short answer
A systematic review concludes the human evidence is thin: the randomized trials are mostly small and use facial creams, so there is no firm answer on what copper peptides do for skin.[1]
A review of topical GHK for wrinkles likewise points to a surprising absence of clinical studies.[2]
The one small randomised skin trial
In a 13-patient trial on laser-resurfaced skin, redness cleared no faster with the GHK-Cu products than without them.[3]
Patients using the GHK-Cu products rated their overall skin quality improvement higher on a questionnaire, although the objective measures showed no difference.[3]
In cultured human skin fibroblasts (a cell study, not a patient result), copper tripeptide lowered secretion of TGF-beta1, a growth factor tied to scarring.[4]
More questions on GHK-Cu
More on GHK-Cu
Sources
- 1A Systematic Review of the Mechanisms and Therapeutic Applications of GHK-Cu (Glycyl-L-Histidyl-L-Lysine-Copper Complex) in Topical Microneedle Delivery: A Case for Expanded Clinical Trials.Archives of internal medicine research · 2026PMID 42787770Accessed 2 Oct 2026
- 2Topically applied GHK as an anti-wrinkle peptide: Advantages, problems and prospective.BioImpacts : BI · 2025PMID 39963574Accessed 2 Oct 2026
- 3Effects of topical copper tripeptide complex on CO2 laser-resurfaced skin.Archives of facial plastic surgery · 2006PMID 16847171Accessed 2 Oct 2026
- 4The effect of copper tripeptide and tretinoin on growth factor production in a serum-free fibroblast model.Archives of facial plastic surgery · 2001PMID 11176716Accessed 2 Oct 2026
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