How does GHK-Cu work?
Tripeptide that binds copper(II) and ferries it into cells. Activates fibroblasts to produce collagen, decorin, and elastin while modulating expression of ~4,000 genes related to tissue repair. Direct effects on follicle stem cells and skin barrier integrity. In plain terms, GHK-Cu is the copper peptide behind a lot of anti-aging serums. Small, mostly industry-linked topical studies report improvements in some skin-aging measures; human evidence for the injectable form is very limited. Mechanistic detail like this comes largely from preclinical and early research, the human picture is limited.
What people use it for
- Skincare users weighing copper-peptide serums for firmness, fine lines, and tone (topical, the best-studied route)
- Anyone comparing a topical serum against online claims about injectable GHK-Cu
- Connective-tissue healing research (limited human data)
- Users researching hair-follicle claims, where the evidence is sparse and often confounded
References
- GHK and DNA: resetting the human genome to health — Pickart L et al., BioMed Res Int, 2014
- GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration — Pickart L, Vasquez-Soltero JM, Margolina A; BioMed Research International; 2015
- The human tri-peptide GHK and tissue remodeling — Pickart L; Journal of Biomaterials Science, Polymer Edition; 2008
Pepdex is an editorial reference, not medical advice. Peptides vary in legal and approval status by country, many are research compounds without full human safety data. Talk to a qualified clinician before starting anything.
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Last updated 2026-06-15.