Peptides
GHK-Cu
50mg
Copper tripeptide complex. 50mg variant of GHK-Cu.
>99% purity · Third-party tested · Batch UKPL-458 · View certificate
- Same-day dispatch before 3pm, Mon to Fri
- Add £45.01 more for free UK delivery
- Cold-chain shipping. Always. Dry-cold pack, Royal Mail Tracked 24
- Lost, damaged or wrong? Replaced free if you tell us within 48 hours.
- Research use only. For in-vitro laboratory research. Not for use in humans or animals, or in food, drugs or diagnostics. Not evaluated by the MHRA or FDA. The buyer is responsible for handling and regulatory compliance.
Bulk Pricing
Counted across your basket, any mix of products.
| Vials in basket | Discount | Per vial |
|---|---|---|
| 1 | None | £23.99 |
| 3-4 | 5% | £22.79 |
| 5-9 | 8% | £22.07 |
| 10-50 | 12% | £21.11 |
GLOW 70mg
Pre-blended regenerative research vial. BPC-157 10mg + TB-500 10mg + GHK-Cu 50mg.
All components in one lyophilised vial, with one certificate.
What is GHK-Cu?
GHK-Cu 50mg is the smaller vial of GHK-Cu, the copper(II) complex of the tripeptide glycyl-L-histidyl-L-lysine, also called copper tripeptide-1. It holds half the lyophilised powder of the 100mg vial, about 124 µmol of complex, as a blue powder.
Full description
The compound is identical in both vial sizes. Its copper transport role, its matrikine origin in type I collagen and the matrix and gene-expression literature are covered on the main GHK-Cu page. What differs at 50mg is the in-use window and the molar arithmetic.
GHK-Cu Research Applications
The research uses match the 100mg vial: copper transport to copper-dependent enzymes, extracellular matrix biology such as collagen, glycosaminoglycan and matrix metalloproteinase-2 expression, and transcriptomic profiling. The 50mg vial is most useful for small-scale work that depends on an intact complex. Examples are spectrophotometry of the Cu(II) centre, stability studies across buffers, competition experiments with other chelators and method development for HPLC or ICP analysis.
GHK-Cu 50mg vs 100mg: Which Vial Size to Choose
Both vials hold the same complex, so the choice is about handling and cost. GHK-Cu is light-sensitive, and freeze-thaw can disturb the copper binding as well as the peptide. A 50mg vial is used up sooner, so one reconstituted stock sees fewer stopper punctures, less light and fewer freeze-thaw cycles. That suits pilot studies, method development, spectrophotometric work and any protocol that will not use 100mg promptly. The 100mg vial costs less per milligram, and one batch and certificate cover twice the work. Molar content is about 124 µmol against about 248 µmol.
Research Overview
GHK-Cu is the copper(II) complex of glycyl-L-histidyl-L-lysine. Pickart and colleagues (Nature, 1980) reported that the tripeptide helps cultured cells take up copper. Fibroblast work later linked GHK-Cu to more matrix metalloproteinase-2 expression (Life Sci, 2000).
Two points are specific to the 50mg vial. The first is exposure. The complex is light-sensitive, and freeze-thaw can disturb the copper coordination separately from any damage to the peptide backbone. A smaller vial finished sooner limits both. The second is arithmetic. Molar calculations must use the mass of the complex, 403.9 g/mol, not the free tripeptide at 340.4 g/mol. The bound Cu(II) ion accounts for 63.5 g/mol of the complex, so the two figures are not interchangeable.
Product Specifications
- Molecular Formula
- C₁₄H₂₄CuN₆O₄
- Molecular Weight
- 403.9 g/mol
- CAS Number
- 89030-95-5
- Sequence
- Gly-L-His-L-Lys, copper(II) complex
- Vial Content
- 50mg lyophilised complex (approximately 124 µmol)
- Free Tripeptide (GHK)
- C₁₄H₂₄N₆O₄, 340.4 g/mol, CAS 49557-75-7
- Purity
- >99% by HPLC
- Batch
- UKPL-458
- Storage
- -20°C lyophilised, 2-8°C reconstituted, protect from light
- Appearance
- Blue to blue-violet lyophilised powder
- Form
- Lyophilised powder
Certificate of Analysis
Third-party tested
- Batch
- UKPL-458
- Purity
- >99%
- Method
- RP-HPLC
- Lab
- Marfleet Analytical Services Ltd
- Tested
- Aug 2026
Need the certificate for an earlier batch? Request an older CoA
Storage and Reconstitution
Keep sealed vials at -20°C, away from light and moisture. After reconstitution, keep the solution at 2-8°C in a light-proof container and use it within 4 weeks. Freeze-thaw can disturb the copper binding, so store single-use aliquots in amber or foil-wrapped vials at -20°C.
Vials are sold on their own, without bacteriostatic water for mixing or other supplies.
How to reconstitute and handle
Let the vial and the bacteriostatic water reach room temperature and swab both stoppers with alcohol. Add the water slowly down the inside wall of the vial, away from direct light, and swirl gently until the blue colour is even. Do not shake or vortex. A blue to blue-violet solution is expected. A colourless or green-tinged one means the complex has been disrupted, which absorbance at around 500 to 600 nm will confirm. Use glass or good polypropylene labware, not stainless steel, which can strip copper from the peptide.
- Strong chelators, phosphate-rich buffers and reducing agents in an experimental medium compete for the copper and change the species actually present.
- Prefer single-use aliquots to repeated access of one stock, and avoid stretching the in-use window of the vial.
For the full method, see the peptide reconstitution guide and the reconstitution calculator.
Research References
- Growth-modulating plasma tripeptide may function by facilitating copper uptake into cells (Nature, 1980)
- GHK-Cu stimulates matrix metalloproteinase-2 expression by fibroblast cultures (Life Sci, 2000)
- GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration (Biomed Res Int, 2015)
Published research on GHK-Cu is indexed on PubMed. See our full UK buyer's guide for GHK-Cu.
GHK-Cu Price (UK)
GHK-Cu is for sale in 2 vial sizes, priced from £23.99 for 50mg to £34.99 for 100mg. Every size ships from our UK facility, each with its own batch certificate. UK delivery is £4.50 by Royal Mail Tracked 24, free over £69.
| Vial | Price | Cost per mg | Availability |
|---|---|---|---|
| GHK-Cu 100mg | £34.99 | £0.35Best value | In stock |
| GHK-Cu 50mgThis page | £23.99 | £0.48 | In stock |
Prices are in GBP per vial and match the basket. See the FAQ for delivery and payment options, and quality & testing for how each batch is checked.
Frequently Asked Questions
GHK-Cu 50mg vs 100mg, which should I choose?
Choose 50mg for pilot work, method development or any protocol that will not use 100mg within a few weeks. Choose 100mg for longer work where cost per milligram and batch continuity matter more. The smaller vial has a technical edge too: GHK-Cu is a light-sensitive copper complex, and a stock finished sooner goes through fewer punctures and freeze-thaw cycles.
Is the GHK-Cu 50mg the same compound as the 100mg vial?
Yes. Both vials hold the same copper(II) tripeptide complex, CAS 89030-95-5, and the 50mg vial is not diluted, blended or modified. Only the mass per vial differs. Each size has its own batch number and certificate, so the 50mg purity figure applies to the 50mg batch.
How many micromoles are in a GHK-Cu 50mg vial?
About 124 µmol: 50mg divided by the complex molecular weight of 403.9 g/mol is 0.1238 mmol. Calculating against the copper-free tripeptide at 340.4 g/mol gives about 147 µmol instead. That overstates the molar content by about 19 percent.
What purity is your GHK-Cu 50mg?
Batch UKPL-458 was tested by Marfleet Analytical Services and measured at above 99% purity by HPLC. The certificate is published on the product page. For a metal-peptide complex, purity describes the peptide, not the copper ratio, so check copper loading by spectrophotometry on receipt if your work depends on it.
Where can I buy GHK-Cu 50mg in the UK?
UK Peptide Lab has GHK-Cu 50mg for sale from UK stock, batch UKPL-458, and you can order online for same-day dispatch before 3pm UK time on working days. UK Royal Mail Tracked delivery is free over £69. The 100mg vial is also stocked. Buyers must be 18 or over and confirm research-only use.
Should I buy GHK-Cu 50mg or 100mg?
Buy 50mg if your work will not use 100mg promptly, and 100mg if cost per milligram and one batch across a long study matter more. The smaller vial also protects the light-sensitive copper complex, because a stock that is finished sooner is exposed less.
How many micromoles of GHK-Cu are in a 50mg vial?
About 124 µmol. That uses the complex molecular weight of 403.9 g/mol. Using the free tripeptide weight of 340.4 g/mol gives about 147 µmol, which overstates the content by roughly 19 percent.
Related Products
