GHK-Cu is a distinctive research peptide — a copper-binding tripeptide that sits in a different category from most of the compounds researchers work with. This guide explains what it is, what it is studied for, and how its copper complex affects handling in the lab, all in a strict research context.
What GHK-Cu is
GHK-Cu is a copper peptide: the tripeptide glycyl-L-histidyl-L-lysine (GHK) bound to a copper(II) ion. The GHK sequence occurs naturally in human plasma, and its affinity for copper is central to what makes it interesting as a research subject. The copper complex also gives the reconstituted solution its characteristic blue tint — a visual property, not a purity indicator. Identity and purity are still established the same way as any peptide: mass spectrometry and HPLC, reported on the certificate of analysis.
What it is studied for
In the research literature, GHK and GHK-Cu have been studied extensively in skin, tissue-remodeling, and gene-expression contexts, which is why the peptide appears frequently in both biochemical research and cosmetic-ingredient research. As with every compound sold here, this is research material — not a therapeutic or cosmetic product for personal use — and descriptions of outcomes in people fall outside what a research supplier represents. GHK-Cu is also a component of blend research products such as GLOW and KLOW.
Reconstitution and handling
GHK-Cu is supplied lyophilized and reconstituted before use. The blue color on reconstitution is expected and comes from the copper complex. As always, the diluent volume sets the concentration — use our free reconstitution calculator for the math and our reconstitution guide for technique, adding water gently and swirling rather than shaking. Bacteriostatic water is the standard multi-draw diluent; see the diluent comparison.
Storage
Keep lyophilized material frozen and sealed, and store reconstituted solution refrigerated and away from light. Our storage and handling guide covers keeping the material stable between draws.
Verifying your material
Color tells you copper is present; it does not tell you the peptide is pure or correctly quantified. Only documentation does that: a current COA from a named independent lab, showing identity and purity, with a lot number matching your vial. Every Summit Research batch of GHK-Cu is tested eight times across independent laboratories with the COA published for the lot before listing. If reading a COA is new, our guide on how to read a peptide COA walks through it quickly.
View third-party tested GHK-Cu at Summit Research →
GHK-Cu is sold strictly for laboratory and research use only. It is not an approved drug or cosmetic product and is not for human or veterinary use. Nothing in this guide is medical advice or a claim regarding use in humans or animals. Provided for informational and research purposes only.