GHK-Cu Copper Peptide 50mg: Product Details, Quality and Ordering
GHK Cu peptide research starts with a very small molecule doing something chemically important: the tripeptide Gly-His-Lys can bind copper. That copper complex, GHK-Cu, has been studied in extracellular-matrix biology, fibroblast activity, collagen and elastin signalling, wound models, and skin research. The evidence is broader than it is for many catalog peptides, but it still needs to be separated by model, route, and product.
At Peptide King, our GHK-Cu Copper Peptide 50mg is listed as a blue lyophilized research powder with ≥98% HPLC-verified purity, a molecular weight of 403.93 g/mol, and the sequence Gly-His-Lys·Cu. The live page also links directly to a current Certificate of Analysis.
This guide explains what GHK-Cu is, why copper changes the molecule, what published research supports, and what the current analytical documentation tells a laboratory about this specific product.
What Is GHK-Cu Peptide?
GHK is the tripeptide glycyl-L-histidyl-L-lysine. It occurs naturally in human plasma, saliva, and urine and can form a complex with copper ions.
Copper Is Part of the Research Identity
Historical research proposed that GHK may help facilitate copper uptake, while later studies examined GHK-Cu in tissue remodelling, extracellular-matrix regulation, fibroblast biology, wound healing, and gene expression.
The Peptide King product page lists the copper complex at 403.93 g/mol.
Reviews have described effects involving collagen, elastin, glycosaminoglycans, metalloproteinases, fibroblasts, angiogenesis, and other repair-associated pathways across laboratory and animal models.
Those findings make GHK-Cu an interesting research tool. They do not mean every proposed effect has been established in humans.
What Does the Human Research Actually Show?
GHK-Cu has more human topical research than many peptides sold for laboratory use, but the evidence is not uniformly positive.
A Randomized Post-Laser Study Had Mixed Results
A randomized study evaluated a topical copper tripeptide complex after CO2 laser resurfacing.
Thirteen participants completed the study. Investigators did not find a significant advantage for GHK-Cu in objective erythema resolution, wrinkles, or overall skin quality, although patient-reported satisfaction with overall skin quality was higher in the GHK-Cu group.
That is a useful result because it shows why “studied in humans” should not automatically be rewritten as “proven effective.”
Much of the Broader Evidence Comes From Other Models
Reviews of GHK and GHK-Cu describe research involving cultured cells, animal wound models, gene-expression datasets, and topical cosmetic studies.
When discussing GHK-Cu research, the model matters. Findings from fibroblasts, mice, or gene-expression analysis should not be presented as established clinical outcomes.
What Does the Peptide King GHK-Cu 50mg Page Specify?
The GHK-Cu page is one of the more detailed product listings in the Peptide King catalog.
The Product Has Clear Molecular Specifications
The live page identifies:
- Quantity: 50mg
- Form: lyophilized powder
- Purity: ≥98% HPLC verified
- Storage: -20°C protected from light
- Molecular weight: 403.93 g/mol
- Sequence: Gly-His-Lys·Cu
It also identifies research areas including dermal repair, collagen and elastin synthesis, inflammatory signalling, and cell differentiation models.
Those research themes should be read as areas of investigation rather than promised biological outcomes.
What Does the Current GHK-Cu Certificate of Analysis Show?
This product gives us something especially useful for quality discussion because the current page links to a lot-specific CoA.
Identity Was Confirmed by LC-MS
The certificate identifies lot PH-CU50-1228 and reports GHK-Cu identity confirmed by LC-MS.
That answers a different question from chromatographic purity. LC-MS provides molecular information that can support whether the tested sample is consistent with the expected compound.
HPLC-UV Purity Was Reported at 99.69%
The certificate reports vial purities of 99.66% and 99.71%, with an average HPLC-UV purity of 99.69%.
That is higher than the product page’s broader ≥98% specification for the tested samples.
It is important to keep the wording precise: the result applies to the samples and lot tested, not automatically to every future GHK-Cu vial.
Measured Net Content Was Separate From Purity
The CoA reports 57.56mg for one vial and 55.14mg for the second, for an average net content of 56.35mg.
The product is nominally listed as 50mg. The analytical report separately gives the measured content of the tested samples.
The Certificate Also Reports Endotoxin Testing
Two endotoxin replicates are reported as passing with an assay sensitivity of ≤0.05 EU/mL using a Limulus Amebocyte Lysate method aligned with USP <85>.
How Should Researchers Read a GHK-Cu CoA?
The current certificate shows why a useful CoA is more than a single “99% pure” badge.
Four Questions Should Stay Separate
| Test area | Question it helps answer |
|---|---|
| LC-MS identity | Is the sample consistent with GHK-Cu? |
| HPLC-UV purity | How dominant is the principal chromatographic component? |
| Net content | How much material was measured? |
| Endotoxin test | Did the tested samples meet the reported assay criterion? |
A laboratory should also record the lot number and report date so results can be connected to the material actually procured.
How Does GHK-Cu Compare With KPV?
Peptide King also lists KPV 20mg, another short peptide that appears in inflammatory and tissue-related research.
Similar Topic Areas Do Not Mean Similar Molecules
KPV is the tripeptide Lys-Pro-Val derived from the C-terminal region of alpha-MSH. GHK-Cu is Gly-His-Lys complexed with copper.
Their structures, literature, analytical characteristics, and research mechanisms are different.
Comparing the two by the broad phrase “repair peptide” would hide more information than it provides.
What Is the Canadian Regulatory Context?
Health Canada specifically lists GHK-Cu among injectable peptide drugs regulated as prescription drugs in Canada and has warned consumers about unauthorized peptide products.
It also states that “For Research Use Only” labelling does not automatically create an exemption from regulatory requirements.
Peptide King states that its GHK-Cu is supplied solely for in-vitro laboratory research and is not for human or animal consumption.
Researchers should confirm that procurement and use comply with the rules that apply to their institution and project.
How We Present GHK-Cu 50mg at Peptide King
At Peptide King, we think the GHK Cu peptide is best evaluated by connecting the molecular science with the actual batch documentation.
The research explains why Gly-His-Lys, copper binding, fibroblasts, extracellular-matrix signalling, and tissue-remodelling models remain interesting.
The product page and CoA answer a different set of questions.
For the current linked lot, researchers can review LC-MS identity, HPLC-UV purity, measured net content, endotoxin results, lot information, and test dates rather than relying on one marketing percentage.
That is the kind of documentation we think makes a research product easier to evaluate: not a broader promise, but more specific information about the material being considered.