GHK-Cu for Skin: What the Evidence Shows
What human and animal studies show about GHK-Cu for skin, how strong that evidence is, and what is still unproven.
- Strongest evidence
- Human RCT
- Human studies
- 18
- PubMed records, our ledger
- Animal studies
- 5
- PubMed records, our ledger
- Studies we summarised
- 8
- with an outcome for skin
Evidence for skin
Each row is an outcome related to skin from a published study, strongest design first. Animal and cell results are labelled and are not human results. User reports are not counted as evidence here.
| Outcome | Result | Study type | Source |
|---|---|---|---|
| Erythema resolution | No significant difference between groups in erythema resolution on computer analysis and blinded evaluation. | Human RCTn = 13 | Archives of facial plastic surgery 2006, PMID 16847171 |
| Patient-reported skin quality | Patients using GHK-Cu skin care products reported significantly greater improvement in overall skin quality (P = .04), but blinded and objective evaluation found no group difference in wrinkles or skin quality. | Human RCTn = 13 | Archives of facial plastic surgery 2006, PMID 16847171 |
| Plantar ulcer closure | Median ulcer area closure was 98.5% with the GHK-copper gel versus 60.8% with vehicle (p < 0.05). | Human RCT | Wound repair and regeneration 1994, PMID 17147644 |
| Ulcer infection | Ulcer infections occurred in 7% with the gel versus 34% with vehicle among ulcers treated immediately after debridement (p < 0.05). | Human RCT | Wound repair and regeneration 1994, PMID 17147644 |
| Crow's feet wrinkles | In one patient, photographs showed greatly decreased wrinkles around the treated eye after a multi-ingredient cosmetic treatment. | Human case reportn = 1 | Journal of cosmetic and laser therapy 2016, PMID 27064823 |
| State of the human evidence | The review states the human literature is thin and fragmented; most randomized trials are small facial cosmetic cream studies. | Systematic review | Archives of internal medicine research 2026, PMID 42787770 |
| Clinical evidence for wrinkles | The review reports a surprising absence of clinical studies of GHK-Cu and Pal-GHK for wrinkles. | Review | BioImpacts 2025, PMID 39963574 |
| Scald wound healing time | Wound healing time was shortened to 14 days with GHK-Cu liposomes in mice. | Animal · mouse (plus human umbilical vein endothelial cells) (not a human result) | Wound repair and regeneration 2017, PMID 28370978 |
| Wound area reduction | By day 13 wound area had decreased by 64.5% with topical tripeptide-copper, 45.6% with vehicle and 28.2% in untreated controls. | Animal · rat (not a human result)n = 24 | Veterinary surgery 2003, PMID 14648529 |
| TGF-beta1 secretion | Copper tripeptide-treated fibroblasts secreted less TGF-beta1 than controls in cell culture. | In vitro (not a human result) | Archives of facial plastic surgery 2001, PMID 11176716 |
PubMed records for GHK-Cu and skin: 18 human, 5 animal (search counts, not studies we reviewed). Grades follow our evidence scale.
How strong is it?
A human randomized trial outweighs any number of animal studies. Animal and cell results show a mechanism worth testing, not that it works in people.
Other peptides people research for skin
All peptides for skin, comparedCommon questions
Does GHK-Cu help with skin?
The strongest study we summarise for skin is human rct evidence, across 8 studies with an outcome for skin. A trial result is not an approval; see the legal status.
Is GHK-Cu approved for skin?
No. GHK-Cu is not FDA approved for any use, including skin.
What is the best peptide for skin?
There is no single answer. Our skin overview compares each candidate by evidence grade and legal status rather than by popularity.
More on GHK-Cu
DosageDoses used in published studies, with the source for each.CalculatorVial, water and dose to syringe units.Side effectsWhat labels and studies report, and what is unknown.ResultsStudy outcomes and when they were measured.PricePrice per mg and per week from dated listings. No vendor links.Legal statusFDA, compounding and WADA status with dates.
Sources
- 1Effects of topical copper tripeptide complex on CO2 laser-resurfaced skin.Archives of facial plastic surgery · 2006PMID 16847171Accessed 2 Oct 2026
- 2Enhanced healing of ulcers in patients with diabetes by topical treatment with glycyl-l-histidyl-l-lysine copper.Wound repair and regeneration : official publication of the Wound Healing Society [and] the European Tissue Repair Society · 1994PMID 17147644Accessed 2 Oct 2026
- 3Significant improvement in crow's feet after treatment with Jet-M and a mixed solution of copper-GHK, oligo-hyaluronic acid, rhodiolar extract, tranexamic acid, and β-glucan (GHR formulation).Journal of cosmetic and laser therapy : official publication of the European Society for Laser Dermatology · 2016PMID 27064823Accessed 2 Oct 2026
- 4A 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
- 5Topically applied GHK as an anti-wrinkle peptide: Advantages, problems and prospective.BioImpacts : BI · 2025PMID 39963574Accessed 2 Oct 2026
- 6GHK-Cu-liposomes accelerate scald wound healing in mice by promoting cell proliferation and angiogenesis.Wound repair and regeneration : official publication of the Wound Healing Society [and] the European Tissue Repair Society · 2017PMID 28370978Accessed 2 Oct 2026
- 7The effect of topical tripeptide-copper complex on healing of ischemic open wounds.Veterinary surgery : VS · 2003PMID 14648529Accessed 2 Oct 2026
- 8The 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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