GHK-Cu increased wound collagen, protein, DNA, and amine oxidase activity in guinea pig skin, and the peptide component was required — copper alone wasn't sufficient.
Peptide requiredThe healing effect needed the GHK peptide-copper complex — copper alone was not sufficient, proving the peptide is biologically active
What the researchers found
GHK-Cu increased wound collagen (hydroxyproline), protein, DNA, and amine oxidase activity in guinea pig skin wounds, with effects requiring the peptide component, not just copper.
Why it matters
GHK-Cu is widely used in skin care products. This study provides direct evidence of its wound-healing effects in living tissue, showing it actively stimulates the cells and molecules needed for tissue repair.
How the study worked
Guinea pig dorsal skin wounds were treated with GHK-Cu or analogs. Hydroxyproline, proteins, DNA, and amine oxidase were measured. Wounds were examined histologically. Parallel experiments tested fibroblast proliferation in culture.
What this study cannot tell us
Animal study in guinea pigs. Wound healing in guinea pig skin may differ from human skin. Only tested topical application to fresh wounds, not aged or damaged skin.
How to read the evidence
Moderate — in vivo animal wound study with appropriate controls (copper alone vs peptide-copper complex).
When this study was published
Published in 1995 (31 years ago). GHK-Cu is now widely used in wound care and anti-aging skincare.
The bigger picture
This answers a key question: is GHK-Cu just a fancy way to deliver copper, or does the peptide itself matter? The answer — the peptide is essential — validates GHK-Cu as a genuine wound-healing agent, not just a mineral supplement.
Questions still open
- Which structural features of GHK are essential for wound healing?
- Does GHK-Cu work on chronic wounds in humans?
Common questions
Is GHK-Cu just delivering copper to wounds?
What does amine oxidase do in wound healing?
Read the original research
Effect of tripeptide-copper complexes on the process of skin wound healing and on cultured fibroblasts.
Archives internationales de pharmacodynamie et de therapie, 330(3), 345-60
Citation
Buffoni, F; Pino, R; Dal Pozzo, A. (1995). Effect of tripeptide-copper complexes on the process of skin wound healing and on cultured fibroblasts.. Archives internationales de pharmacodynamie et de therapie, 330(3), 345-60.