GHK-Cu: Copper-Peptide Research in Skin and Wound Biology
GHK-Cu is a complex formed when the naturally occurring tripeptide glycyl-L-histidyl-L-lysine binds copper. Research interest has focused on extracellular-matrix remodeling, collagen regulation, fibroblast activity, inflammation, skin biology, and wound healing.
One multicenter, randomized, evaluator-blinded study examined a topical GHK-Cu gel in patients with diabetic neuropathic ulcers. All participants also received standardized wound care. The investigators reported greater median ulcer-area closure and a lower incidence of infection in certain ulcers treated with the GHK-Cu formulation compared with vehicle. This study involved a specific topical gel applied to diagnosed wounds under medical supervision.
Other clinical results have been less definitive. A small randomized study of 13 patients using GHK-Cu-containing skin-care products after carbon-dioxide laser resurfacing found no statistically significant objective improvement in erythema, wrinkles, or overall skin quality compared with the control regimen. Patient-reported satisfaction was higher in the GHK-Cu group.
Research significance
These studies suggest that GHK-Cu may interact with biological pathways involved in skin repair and matrix remodeling. However, evidence involving topical products cannot be used to establish the safety, bioavailability, or effects of injectable or systemic GHK-Cu.
References
- Mulder GD, Patt LM, Sanders L, et al. Enhanced healing of ulcers in patients with diabetes by topical treatment with glycyl-L-histidyl-L-lysine copper. Wound Repair and Regeneration. 1994;2:259–269. DOI: 10.1046/j.1524-475X.1994.20406.x.
- Miller TR, Draelos ZD. Effects of topical copper tripeptide complex on carbon-dioxide laser-resurfaced skin. Archives of Facial Plastic Surgery. 2006;8:252–259. DOI: 10.1001/archfaci.8.4.252.
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References to clinical trials or FDA-approved prescription products describe the specific materials and formulations evaluated in those studies. These results do not establish that an independently manufactured research material has the same identity, purity, potency, pharmacokinetics, safety, or effectiveness.
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