Peptides

GHK-Cu

Name: GHK-Cu 50mg
Brand: UK Peptide Lab
SKU: UKPL-748
Price: 23.99 GBP
Availability: InStock

50mg

Copper tripeptide complex. 50mg variant of GHK-Cu.

£23.99In Stock

>99% purity · Third-party tested · Batch UKPL-458 · View certificate

Size

50mg£23.99£0.48/mg 100mg£32.99£0.33/mg

Quantity

Same-day dispatch before 3pm, Mon to Fri
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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%	£22.79save £1.20
5-9	8%	£22.07save £1.92
10-50	12%	£21.11save £2.88

Available as a Pre-Blended Vial

GLOW 70mg

Pre-blended regenerative research vial. BPC-157 10mg + TB-500 10mg + GHK-Cu 50mg.

£59.99

All components in one lyophilised vial, with one certificate.

View blend

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

This page covers the 50mg presentation of GHK-Cu, the copper(II) complex of glycyl-L-histidyl-L-lysine, molecular formula C₁₄H₂₄CuN₆O₄, molecular weight 403.9 g/mol, CAS 89030-95-5. The compound is identical to that in the 100mg vial, and the copper-shuttle model, matrikine classification and extracellular matrix literature are set out on the main GHK-Cu page. What this page addresses is what changes at half the vial content. The choice between 50mg and 100mg is mostly a question of in-use exposure rather than economy. GHK-Cu is a photolabile copper(II) complex, and freeze-thaw cycling can disrupt the copper coordination sphere independently of any damage to the peptide backbone. A 50mg vial is consumed across a shorter working life, which means fewer stopper penetrations, less cumulative light exposure and fewer freeze-thaw cycles on one reconstituted stock. For pilot studies, method development, or any protocol that will not consume 100mg inside a sensible in-use window, the smaller vial is the technically preferable choice rather than merely the cheaper one. The 100mg vial wins on cost per milligram and on batch continuity across a larger body of work. One arithmetic point is specific to this size, where a proportional error is easy to overlook. Molar calculations must use the mass of the complex, 403.9 g/mol, and not the free tripeptide at 340.4 g/mol. A 50mg vial of GHK-Cu therefore contains approximately 124 µmol of complex, whereas computing against the copper-free tripeptide would return roughly 147 µmol and overstate the figure by about 19 percent.

Product Specifications

GHK-Cu 50mg · Technical Data

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

View Lab Certificate Verify batch UKPL-458

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.

Use 403.9 g/mol, the mass of the copper complex, for any molar calculation on this vial. Substituting the free tripeptide mass of 340.4 g/mol overstates the molar content of a 50mg vial by roughly 19 percent.
Protect from light throughout handling. Copper(II) peptide complexes are photolabile, and reconstitution should be carried out away from direct light with aliquots transferred to amber or foil-wrapped vessels.
Confirm the blue to blue-violet colour on reconstitution. A colourless or green-tinged solution indicates the complex has been disrupted rather than simply diluted. Visible absorption spectrophotometry around 500-600 nm is the standard bench check on complex integrity.
Use glass or high-grade polypropylene labware and avoid prolonged contact with stainless steel or other chelating surfaces that can strip Cu(II) from the tripeptide. Strong chelators, phosphate-rich buffers and reducing agents in the experimental medium will compete for the copper centre.
Prefer single-use aliquots to repeated access of one stock. Freeze-thaw cycling can disrupt the copper coordination sphere as well as degrade the peptide backbone. The shorter working life of a 50mg vial is part of its advantage over the 100mg presentation, so avoid extending it unnecessarily.

For the full method, see the peptide reconstitution guide and the reconstitution calculator.

Research References

Published research on GHK-Cu is indexed on PubMed. See our full UK buyer's guide for GHK-Cu, UK buyer's guide for GHK-Cu 50mg and UK buyer's guide for GHK-Cu CoA.

GHK-Cu Price (UK)

GHK-Cu is for sale in 2 vial sizes, priced from £23.99 for 50mg to £32.99 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.

GHK-Cu · Price per vial

Vial	Price	Cost per mg	Availability
GHK-Cu 100mg	£32.99	£0.33Best 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 consume 100mg within a reasonable in-use window, and choose 100mg for extended work where cost per milligram and batch continuity matter more. The reasoning is not only economic. GHK-Cu is a photolabile copper complex whose coordination sphere is vulnerable to freeze-thaw cycling, so the smaller vial's shorter working life means fewer stopper penetrations, less light exposure and fewer freeze-thaw cycles on one stock.

Is the GHK-Cu 50mg the same compound as the 100mg vial?

Yes, identical. Both vials contain the same copper(II) tripeptide complex at 403.9 g/mol, CAS 89030-95-5, and the 50mg vial is not a diluted, blended or otherwise modified preparation. Only the mass per vial differs. Each vial size carries its own batch number and its own published certificate of analysis, so the purity figure for the 50mg vial applies to that batch rather than being carried over from the 100mg batch.

How many micromoles are in a GHK-Cu 50mg vial?

Approximately 124 µmol. Dividing 50mg by the complex molecular weight of 403.9 g/mol gives 0.1238 mmol, or about 124 micromoles. The common error here is calculating against the copper-free tripeptide at 340.4 g/mol, which returns roughly 147 µmol and overstates the true molar content by about 19 percent. The bound Cu(II) ion accounts for 63.5 g/mol of the complex mass, so the two figures are not interchangeable.

What purity is your GHK-Cu 50mg?

The current GHK-Cu 50mg batch is UKPL-458, verified at above 99% purity by HPLC, with the certificate of analysis published on this product page. One caveat applies to any metal-peptide complex: a purity figure reports the peptide, not the copper stoichiometry. Researchers who need the copper loading confirmed should verify it spectrophotometrically on receipt, since the visible absorption band around 500-600 nm reports directly on the intact Cu(II) centre.

Where can I buy GHK-Cu 50mg in the UK?

UK Peptide Lab supplies GHK-Cu 50mg in the UK from stock, batch UKPL-458 at above 99% purity by HPLC, with the third-party certificate of analysis published on this page, dispatched the same day on orders placed before 3pm UK time. Free UK Royal Mail Tracked shipping on orders over £69. The 100mg vial of the same compound is also stocked. Purchasers must be 18 or over and confirm research-only use. Not for human consumption or cosmetic application.

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.

Research Use Disclaimer