How Long Does GHK-Cu Last? Shelf Life & Stability
"Stable" is meaningless without saying stable against what. GHK-Cu has its own set of degradation routes, and they determine which storage precautions actually matter for it.
In plain English
Colour is data here, which is unique in this library. The copper can detach in acidic conditions, and chelating agents such as EDTA — routine additives in many ordinary buffers — will strip it out entirely. Reducing agents collapse the whole structure. Each of these shows as the blue fading.
What GHK-Cu actually is
GHK-Cu is three amino acids holding onto a copper atom — and the copper is part of the molecule, not an additive. It was identified in human blood in 1973, and researchers noticed its levels fall considerably with age. It is the only compound here whose condition you can partly judge by looking at it.
Supplied for laboratory research use only — not for human or animal use.
Third-party tested by HPLC and LC-MS, ≥99% purity, with a Certificate of Analysis on every order. Ships across Canada.
Technical detail below
Degradation routes specific to GHK-Cu
- Copper dissociation at acidic pH — the complex-specific failure mode, visible as fading or loss of the blue colour.
- Copper-catalysed oxidation of the histidine residue, an unusual case of the bound metal degrading its own ligand.
- Competition from chelators: EDTA or other strong chelators in a buffer will strip the copper.
- Precipitation as copper hydroxide species at strongly alkaline pH.
For GHK-Cu, colour is data. A solution that has gone pale, colourless, or green rather than clear blue is signalling that the coordination chemistry has changed, and no peptide-based intuition covers that.
Freeze–thaw tolerance
Aliquot on reconstitution. Freeze–thaw cycling risks local pH shifts during ice formation, which is a specific hazard for a pH-sensitive coordination complex.
How storage addresses these routes
Practical window once reconstituted: 2–4 weeks at 2–8 °C. Protect from light; copper complexes are photo-reactive and copper can catalyse oxidation of the peptide it is bound to.
Full GHK-Cu storage conditionsWhat GHK-Cu is studied for
The best-populated area of the GHK-Cu literature, examined in dermal fibroblast models.
Studied for effects on the MMP/TIMP balance governing matrix turnover.
Copper itself is an angiogenic cofactor, and the complex is studied in that context.
Plasma GHK falls substantially between early and later adulthood, a finding central to research interest in the molecule.
Summarizes published preclinical literature. Provided for research reference only; not a claim of efficacy or a description of human use.
More GHK-Cu reference
Lyophilized and reconstituted storage conditions, plus the practical working window.
Diluent selection, dissolution behaviour, and the calculator preset for this compound.
Which solvents work, why, and what abnormal dissolution behaviour indicates.
Which assays are informative for this molecule, and what to actually check on its COA.
Compound-specific bench practices, and the errors most often made with this molecule.
What to inspect on arrival, and which conditions actually warrant rejecting a vial.
Questions specific to this compound — structure, chemistry, and common misconceptions.
Stability reference for other compounds
GHK-Cu is supplied strictly as a research chemical for in-vitro laboratory and research use only. It is not intended for human or animal consumption, diagnostic, or therapeutic use. This page is educational laboratory-handling reference information — not medical advice, not usage guidance, and not a protocol.