Name: GHK-Cu 50mg (10 Vials / Kit)
Brand: HK Peptide
SKU: HK-CU50
Price: 24.00 USD
Availability: InStock

What is GHK-Cu?

GHK-Cu is a three-amino-acid peptide, glycine-histidine-lysine, that binds copper(II) ions with high affinity. It occurs naturally in human plasma, saliva and urine, and its measured concentration decreases with age, which is part of why it has drawn attention in skin- and regeneration-focused research.

How it is understood to work

The complex is studied for its role in delivering copper to cells and modulating expression of genes tied to extracellular matrix remodeling, with reports of increased collagen, elastin and glycosaminoglycan production alongside antioxidant and anti-inflammatory activity in cell-based assays.

Research status

Most published work covers dermatological and cosmetic-science research, including skin firmness, hair-follicle and wound-healing models, along with broader studies of age-related gene-expression change. Findings largely come from cell culture and topical or animal studies rather than large controlled human trials.

This listing: HK Peptide GHK-Cu

Brand: HK Peptide
Kit: 10 vials × 50 mg (500 mg in total)
Price per vial: $2.40
Price per mg: $0.05
Other strengths: 100mg $48.00
Also sold by: Uther Peptide 50mg $55.00 · Uther Peptide 100mg $70.00 · Uther Peptide GHK-CU Raws 10g $110.00

Lab testing

HK Peptide published a Janoshik #107750 report for this compound. Test: Purity & Content (HPLC). Result: 99.39% purity · 66.11 mg. Tested Feb 13, 2026. Verification key I65MN1AEG89N can be checked at janoshik.com.

View the report · How to read it (Testing 101) · Every report for this compound

Bought through escrow: the brand is only paid after you confirm delivery. If the parcel never arrives, or an independent test shows the wrong compound or a significant under-fill, open a claim before releasing payment.

Specifications

Compound: GHK-Cu
Also known as: Copper Tripeptide-1, Glycyl-L-Histidyl-L-Lysine copper complex
Class: Copper-binding tripeptide complex
Form: Lyophilized (freeze-dried) powder
Per vial: 50mg
Molecular formula: C₁₄H₂₂CuN₆O₄
Molecular weight: 401.9 g/mol
Sequence: Gly-His-Lys (copper complex)
Stated purity: ≥99% (HPLC)
Appearance: White lyophilized powder

Handling & storage

Supplied as a lyophilized powder that reconstitutes into a characteristic blue solution from the bound copper ion; store unopened vials at -20 C protected from light, and keep reconstituted solution refrigerated, discarding it if the blue color fades noticeably, which can indicate copper dissociation.

Concentration check: adding 2 ml of bacteriostatic water to one 50 mg vial gives 25 mg/ml. The Research Lab calculator in your dashboard works this out for any volume.

Questions

Why does GHK-Cu solution appear blue?

The blue color comes from the copper(II) ion coordinated within the peptide complex; a well-preserved solution should retain a consistent blue tint, and a marked color shift can signal degradation.

Is GHK-Cu the same thing as ‘copper peptide’ skincare ingredients?

Commercial copper-peptide skincare products are typically based on the same GHK-Cu complex, though formulation, concentration and delivery vehicle differ substantially from a research-grade lyophilized peptide.

How much GHK-Cu is in this kit?

10 vials of 50 mg each, so 500 mg in total. The lab testing section above shows what the brand’s tested vial actually contained.

For laboratory research use only. Not for human or veterinary use. Nothing on this page is medical advice.