What is the GHK-Cu peptide?
GHK is a naturally occurring tripeptide — glycine, L-histidine and L-lysine — first isolated from human plasma. On its own it is simply called the GHK peptide. When it binds a copper(II) ion it becomes GHK-Cu, the copper peptide, and that is the form used in virtually all of the published literature.
- Sequence: Gly-His-Lys (GHK)
- Complex: GHK bound to copper(II) — hence the "Cu"
- Appearance: deep-blue lyophilised powder
- Supply: 100mg vial, or 50mg inside the GLOW and KLOW blends
GHK-Cu, GHK Cu, GHKCu, copper GHK — are they all the same?
Yes. The compound is written a dozen different ways and every one of them points at the same molecule. GHK-Cu is the correct scientific notation; GHK Cu and GHKCu are just the hyphen dropped. "Copper GHK", "GHK copper peptide" and "GHK-Cu copper peptide" are descriptive names for the copper-bound complex. "GHK peptide" alone technically means the bare tripeptide, but in practice it is used interchangeably.
If a supplier lists a GHK-Cu product where the powder is white rather than blue, treat it as a red flag — the copper complex should always be visibly blue.
The research context
In laboratory settings GHK-Cu is studied for its copper-binding behaviour and its interaction with extracellular-matrix, skin and hair-follicle signalling pathways. Research applications focus on receptor binding activity, peptide stability, and how the copper complex behaves under controlled experimental conditions.
None of this constitutes evidence of a human outcome, and GHK-Cu supplied by us is not for human use.
GHK-Cu prices in the UK
| Product | GHK-Cu content | Price |
|---|---|---|
| GHK-Cu 100mg | 100mg | £79.00 |
| GLOW blend | 50mg + BPC-157 10mg + TB-500 10mg | £59.99 |
| KLOW blend | 50mg + TB-500, BPC-157 and KPV 10mg | £79.99 |
Not sure which blend? Read the GLOW vs KLOW comparison.
Reconstituting GHK-Cu
- Wipe the stopper with an alcohol swab and allow it to dry.
- Add bacteriostatic water slowly down the inside wall of the vial.
- Swirl gently until the solution is clear and blue — never shake.
- Label the vial with concentration and reconstitution date.
- Store at 2–8°C, protected from light, and avoid repeated freeze-thaw cycles.
For exact volumes rather than a generic chart, use the free peptide reconstitution calculator.
Purity, testing & UK delivery
- Independently HPLC and mass-spec tested, ≥98% purity.
- Batch Certificates of Analysis published openly.
- UK-held stock — same working day dispatch before 2pm, Mon–Fri.
- Royal Mail Tracked 24 with photo confirmation, discreet plain packaging.
- Free 4 needles + 4 alcohol swabs with every vial — opt in at checkout.
Related guides
Frequently asked questions
What is GHK-Cu?
GHK-Cu is a copper peptide — the tripeptide glycyl-L-histidyl-L-lysine bound to a copper(II) ion. The copper complex is what gives the powder its characteristic deep-blue colour. It is one of the most widely studied peptides in extracellular-matrix and skin-signalling research.
What is the difference between GHK and GHK-Cu?
GHK is the bare tripeptide. GHK-Cu is the same tripeptide with a copper(II) ion coordinated to it. Almost all published research uses the copper-bound form, which is why 'GHK peptide', 'copper GHK' and 'GHK-Cu' are usually referring to the same research compound.
How do you spell GHK-Cu?
GHK-Cu, GHK Cu, GHKCu and GHK copper peptide all refer to the same compound. The hyphenated GHK-Cu is the standard scientific notation, where Cu is the chemical symbol for copper.
Where can I buy GHK-Cu peptide in the UK?
Peptides UK 4U stocks GHK-Cu 100mg vials in the UK at £79.00, dispatched the same working day on orders placed before 2pm. We also supply GHK-Cu inside the GLOW and KLOW multi-peptide blends.
How much is GHK-Cu in the UK?
A GHK-Cu 100mg vial is £79.00. The GLOW blend (GHK-Cu 50mg with BPC-157 10mg and TB-500 10mg) is £59.99, and KLOW (GHK-Cu 50mg with TB-500, BPC-157 and KPV) is £79.99.
What purity is your GHK-Cu?
Every GHK-Cu batch is tested to at least 98% purity by RP-HPLC with mass-spec confirmation. The batch number printed on the vial matches a published Certificate of Analysis so purity can be verified before the vial is opened.
Why is the GHK-Cu powder blue?
The deep-blue colour comes from the coordinated copper(II) ion bound to the GHK tripeptide. A GHK-Cu powder that is white rather than blue should be treated as suspect — it suggests the copper complex is absent or the material is not what it claims to be.
How is GHK-Cu reconstituted and stored?
Add bacteriostatic water slowly down the inside wall of the vial and swirl gently until the solution is clear and blue — never shake. Store the reconstituted solution at 2–8°C, protected from light, and avoid repeated freeze-thaw cycles. Use the free peptide calculator for exact volumes.
Is GHK-Cu legal in the UK?
GHK-Cu is legal to buy and possess in the UK for laboratory research purposes. It is not a licensed medicine in the UK and is supplied strictly for in vitro research use only — not for human or animal consumption.
What is the difference between GLOW and KLOW?
Both are GHK-Cu based blends. GLOW contains GHK-Cu 50mg with BPC-157 10mg and TB-500 10mg. KLOW adds KPV 10mg on top of the same three, which is why it is studied around inflammatory-pathway work as well as matrix signalling.
Disclaimer: All products sold by Peptides UK 4U are for laboratory and research purposes only. They are not intended for human or animal consumption, diagnosis, treatment or prevention of any disease.