GHK-Cu

What is GHK-Cu?

GHK-Cu is a complex of the tripeptide GHK (glycine–histidine–lysine) and copper(II) ions. The GHK peptide was first described in the 1970s, when researchers identified it in human plasma. It was later found to have a high affinity for copper and to be able to influence processes related to tissue renewal.

Chemically, it is a small, relatively stable molecule that, because of its size and properties, is frequently the subject of research in cell cultures and skin models.

What is studied?

In preclinical research, GHK-Cu has been linked to several processes:

• collagen synthesis in fibroblasts;
• elastin synthesis and organisation of the extracellular matrix;
• antioxidant response and reduction of oxidative stress in some models;
• wound healing and tissue remodelling;
• effects on gene expression related to tissue repair.

The results are consistent with the biological role of copper in enzymes involved in collagen formation, but a distinction must be drawn between mechanism and demonstrated clinical effect. Much of the literature comes from in vitro experiments that do not capture the complexity of a living organism.

Cosmetics, research and regulation

GHK-Cu is popular in the cosmetics industry, where it is used in formulations for mature skin. This can create the mistaken impression that any GHK-Cu is “cosmetics”. Our product is a research material in lyophilized form, intended for laboratory use. It is not a cosmetic product and is not intended for direct application to the skin.

Nor is it a medicine. Claims about “rejuvenation” or “scar treatment” go beyond what the available data can support.

Quality and stability

Copper complexes are sensitive to light, pH and the presence of chelating agents. Research therefore needs to take into account:

• freshly prepared solutions and protection from light;
• an appropriate pH range as determined by the protocol;
• storage of the lyophilizate at −20 °C;
• the declared purity, described by the HPLC method.

The listing declares a purity of ≥ 99 % (HPLC). Details of what analytical figures mean are in the article HPLC and mass spectrometry.

Conclusion

GHK-Cu is a biologically interesting and well-described peptide whose research value lies mainly in the study of skin biology and the extracellular matrix. For laboratory use, the decisive factors are the quality of the material, correct storage and a clear separation between research and clinical use.