GHK-Cu for Sale: 100 mg Vial Price, COA and What to Check Before You Order
Research use only. Peptides supplied by Peptryn are sold strictly for in vitro and preclinical laboratory research. They are not approved by the FDA for human or veterinary use, and nothing here is medical advice, a dosing recommendation, or an instruction for self-administration. This page explains what Peptryn’s GHK-Cu listing includes and how to check any GHK-Cu vial.
Quick answer: Peptryn sells GHK-Cu as a 100 mg lyophilized research vial for $74.99, which is $0.75 per mg. Lot 2026-08-05 reads 99.93% HPLC purity with a negative endotoxin result, tested by MZ Biolabs, and the certificate links to a report on the lab’s own site. GHK-Cu is also a cosmetic ingredient, so search results mix skincare products, supplements and research vials. Peptryn’s listing is a laboratory material, sold only for research to buyers who are 21 or older.
This page covers the buying side: the price, what the certificate shows and leaves out, and the checks that matter for a copper peptide. For the research on GHK-Cu itself, read our copper peptides guide.
Key takeaways
- The 100 mg vial lists at $74.99 ($0.75 per mg). Quantity pricing takes 3%, 5% or 10% off.
- Lot 2026-08-05 reads 99.93% purity and negative endotoxin. The purity and identity record sits on MZ Biolabs’ own site.
- The peptide alone (GHK) and the copper complex (GHK-Cu) differ in mass by about 63.5 Da. The lab report prints the expected and measured mass of the complex (402.10 Da and 402.13 Da) but no separate copper assay.
- In our September data report the lab measured 112.46 mg against the 100 mg label (+12.5%). That is one lot from one lab.
Last verified October 12, 2026. Prices and lot details are as listed on that date and change with each batch, so check the product page and certificate before you rely on a number. Sources are listed at the end. For laboratory and research use only. Nothing here is medical or legal advice.
What Peptryn’s GHK-Cu vial includes
| Item | Detail |
|---|---|
| Form and size | Lyophilized powder, 100 mg |
| Listed price | $74.99 ($0.75 per mg) |
| Quantity pricing | 3% off at 3 to 4 units ($72.74 each), 5% off at 5 to 9 ($71.24), 10% off at 10 or more ($67.49) |
| Lot | 2026-08-05 |
| Lab analysis date | 2026-08-24 |
| HPLC purity | 99.93% (HPLC-UV-MS) |
| Endotoxin | Negative |
| Lab | MZ Biolabs, Tucson, Arizona |
| Storage | -20 °C, protected from light |
| CAS number | 49557-75-7 |
| Certificate | GHK-Cu 100 mg COA |
The product page lists the full specification. Peptryn does not give dosing or use guidance for GHK-Cu.
GHK-Cu price: what to compare
At the listed price, the 100 mg vial costs $0.75 per mg. Price per mg compares two sellers only when the products match, so line up these before you compare:
- The size and form. A 50 mg vial and a 100 mg vial are different purchases. Raw powder sold by the gram for skincare formulas is a different category from a research vial.
- The lot and the lab. A price with no lot-matched report gives you a number and no verification.
- What the report covers. Purity, identity, endotoxin and quantity are separate results.
- Which compound the listing means. See the next section.
GHK or GHK-Cu: what a certificate should tell you
GHK is the tripeptide glycyl-L-histidyl-L-lysine. GHK-Cu is its copper(II) complex. The product specification gives the peptide alone as C14H24N6O4 at 340.38 Da and the copper complex as C14H24CuN6O4 at about 403.9 Da (calculated). The two differ by about 63.5 Da, which is enough for a mass spectrum to tell them apart.
That makes the identity line worth reading. A report that lists a mass near 340 Da is describing the peptide alone, and one near 404 Da is describing the complex. A purity figure does not settle this, because HPLC purity is the main peak’s share of all detected peaks.
Peptryn’s certificate lists identity as tested by HPLC-UV-MS, and the lab report prints the expected and measured mass (402.10 Da and 402.13 Da). It reports no separate copper assay, so email us through the contact page if you need copper content confirmed for your lot.
What the GHK-Cu certificate shows
| Question | What the certificate shows |
|---|---|
| Method | HPLC-UV-MS |
| Purity | 99.93% |
| Endotoxin | Negative |
| Where the records sit | The purity and identity record is on MZ Biolabs’ own site and linked by a QR code on the certificate. The endotoxin report is a PDF shown on the certificate page |
| Quantity and mass | The lab report prints a measured quantity per vial (112.46 mg against the 100 mg label) and the expected and measured monoisotopic mass (402.10 Da and 402.13 Da). It reports no separate copper assay |
Our September 2026 data report read the lab’s report for this lot and listed the measured quantity. The lab reported 112.46 mg of GHK-Cu against a 100 mg label, a difference of +12.5%. The same report found 51.79 mg of GHK-Cu in the 50 mg Glow component (+3.6%) and 50.65 mg in Klow80 (+1.3%). Each figure comes from one lot, from one laboratory, without a stated assay uncertainty. The report lists open questions, including whether a quantity figure is net peptide content or the gross contents of the vial.
Five checks for any GHK-Cu vial
- Which compound is it? Peptide alone or copper complex? Look for the mass on the report, not only the name on the label.
- Does the lot match? Compare the lot on your vial with the lot on the report, and check that the analysis date fits the lot date.
- Is the report on the lab’s own site? A link or QR code to the lab’s record beats a PDF that lives only on the seller’s server. Our third-party tested peptides guide sorts these claims into five levels.
- Which tests are on the report? Identity, purity, endotoxin and quantity are different tests. Each one missing is a gap, and our certificate guide shows how to read them.
- How does the seller describe use? A research listing gives no dosing schedule or instructions for use on people. Listings that call the same powder a cosmetic ingredient or a formula base for skin products are selling something else.
Why GHK-Cu search results look so mixed
GHK-Cu is sold widely in skincare. On October 11, 2026, the first page for “ghk-cu for sale” held skincare and supplement retailers, compounding pharmacies and clinic pages. A search for “ghk-cu powder” returned cosmetic powders sold for formulating at home. Searches for “ghk-cu vial” returned research listings alongside pages on generically named domains.
Peptryn’s listing is a laboratory research material. It is not a cosmetic, a supplement or a drug, and Peptryn does not offer it for human use.
Common questions
Where can I buy a GHK-Cu vial for research?
Peptryn sells GHK-Cu as a 100 mg lyophilized research peptide on its GHK-Cu product page. It is sold only for laboratory research, to buyers who are 21 or older and who confirm qualified research use.
How much does GHK-Cu cost?
Peptryn lists the 100 mg vial at $74.99, which is $0.75 per mg. Quantity pricing takes 3% off at 3 to 4 units, 5% at 5 to 9 and 10% at 10 or more. Prices change, so check the product page.
Is Peptryn’s GHK-Cu third-party tested?
Yes. Lot 2026-08-05 was tested by MZ Biolabs, which reports 99.93% HPLC purity and a negative endotoxin result. The purity and identity record is on the lab’s own site, and Peptryn is the client that ordered the test.
What is the difference between GHK and GHK-Cu?
GHK is the tripeptide alone, 340.38 Da. GHK-Cu is its copper complex, about 403.9 Da as calculated. A certificate should show which one the vial contains.
What does a GHK-Cu COA show?
Peptryn’s certificate shows the lot, the method (HPLC-UV-MS), 99.93% purity, a negative endotoxin result and the lab. It also prints the expected and measured mass and the measured quantity per vial, but no separate copper assay.
Does the certificate include copper content or quantity?
It includes the quantity but no copper assay. The lab report on the certificate page prints a measured quantity of 112.46 mg against the 100 mg label for this lot. Ask through the contact page if you need copper content confirmed.
How is GHK-Cu stored?
Per the Peptryn product specification, store the lyophilized powder at -20 °C, protected from light.
Is research GHK-Cu the same as cosmetic copper peptide powder?
No. Cosmetic powders are sold for formulating skin products and carry cosmetic labeling. Peptryn’s GHK-Cu is sold only as a laboratory research material, with a lot-matched certificate, and is not offered for human use.
Related: Copper peptides guide · COA Library · Third-party tested peptides · Peptide COA data report · How to read a certificate of analysis · Peptide purity · Glow peptide guide
Sources
All pages were read on October 11 and 12, 2026 unless noted.
- Peptryn. GHK-Cu product page; GHK-Cu 100 mg certificate; COA Library; Peptide COA data report, September 26, 2026; Copper peptides guide.
- MZ Biolabs. Certificate report for lot 2026-08-05, linked from the Peptryn certificate above.
- Search results for “ghk-cu for sale”, “ghk-cu powder” and “ghk-cu vial”, Google US, October 11, 2026.
Editorial note: Peptryn sells the research peptides discussed on this site for laboratory use only. This guide is informational and is not medical advice. To report an error, use the contact page.
All products on peptryn.com are intended for laboratory research purposes only. They are not drugs, foods, dietary supplements or cosmetics, and they are not for human consumption, self-administration, or veterinary use. You must be 21 or older to buy. The information on this page has not been evaluated by the U.S. Food and Drug Administration and is not intended to diagnose, treat, cure, or prevent any disease.
