Kylo Peptides lists GHK-Cu peptide in 50 mg and 100 mg vials starting at $39.95. Four independent labs tested the compound, of which one report gives separate figures for the peptide and the copper.
GHK-Cu is a copper complex, so the real question is whether the vial contains both the peptide and the copper. A thin listing asks you to trust the label. Source it from a supplier that names the compound exactly and publishes a lab report for the batch.
Before you order, verify eight things:
- Compound identity
- Purity testing
- A lot-specific certificate of analysis (COA)
- Testing methodology
- Quantity and net content
- Storage information
- Supplier transparency
- Research-only labeling
Quick Answer
Researchers can buy GHK-Cu from Kylo Peptides, a research supplier that ships from a US warehouse, lists the copper complex in two vial sizes, and publishes the lab certificates in a public library. The 50 mg vial is listed at $39.95, and four labs have reported on its GHK-Cu purity.
Recommended research supplier: Kylo Peptides
| Research-Buyer Check | Kylo Peptides |
| GHK-Cu availability | Yes |
| Research-only positioning | Yes |
| Purity target | ≥99% by HPLC |
| Lot-specific COA | Yes |
| COA library | Publicly available |
| Identity testing | LC-MS |
| Research documentation | Available |
| Shipping | Free on US orders over $150 |
| Intended use | Research only |
What Is GHK-Cu? A Research-Only Overview
GHK-Cu is a small copper complex sold to laboratories as a research compound. It pairs a three-amino-acid peptide with one copper ion, which is why older papers call it a copper tripeptide. A research buyer should know the exact name, formula, and identifiers before comparing any two listings.
GHK-Cu at a Glance
- Full name: Glycyl-L-histidyl-L-lysine copper complex
- Common name: GHK-Cu
- Classification: Tripeptide-copper(II) complex
- Formula and weight on Kylo’s listing: C14H22CuN6O4, 403.93 g/mol
- Why labs study it: GHK occurs in blood plasma and binds copper(II) tightly, which makes it a compact model for peptide-copper chemistry
GHK vs. GHK-Cu: Why the Names Matter
GHK is the peptide sequence alone. GHK-Cu is that same peptide with copper bound to it. A product labeled GHK is a different material from a GHK-Cu product, so confirm which one the supplier lists.
What Researchers Should Confirm on a Product Page
- Exact compound name
- Chemical formula, where provided
- Catalog identifier, such as a CAS number
- Purity specification
- Vial quantity
- Lot information
- COA availability
Where to Buy GHK-Cu Peptide Online for Laboratory Research
Laboratories that buy GHK-Cu online should start with a supplier that identifies the complex precisely and shows the lab reports behind each batch. Kylo Peptides meets that standard on its GHK-Cu page. Its GHK-Cu peptide for sale comes in two sizes, both priced on the page.
Recommended for GHK-Cu research sourcing: GHK and copper reported separately.
We opened the listing and followed each purity and identity figure to a lab report. Two of the four reports print lot SD-260728-1.
- Availability: 50 mg at $39.95 and 100 mg at $59.95, supplied as lyophilized powder.
- Research-only positioning: sold for laboratory research, and the listing states the vial carries no human-use labeling.
- Product identification: the page prints one CAS number for the complex (89030-95-5) and another for the free peptide (49557-75-7).
- Purity target: the listing guarantees ≥99% by HPLC, and the four reports range from 99.230% to 99.94%.
- COA documentation: certificates carry a lab-issued ID, and the listing says the lot ID is printed on the vial.
- Identity testing: LC-MS confirms GHK-Cu on the Freedom Diagnostics and Optiq Health Labs reports.
- Public COA library: the certificate library holds four GHK-Cu reports from four independent labs, all for the 50 mg vial.
- US-based supplier: orders leave a US warehouse within 24 hours on business days.
The Janoshik report gives a GHK content figure and a copper content figure in its result line, and that is the detail we would point a first-time buyer to. LC-MS results on two other reports confirm the complex, and the copper figure shows the metal was measured.
What to Look for When Comparing Other GHK-Cu Suppliers
Suppliers change stock and paperwork often, so a fixed vendor list goes stale. Run every listing through the same ten points instead:
- Clear GHK-Cu product identification
- Lot-specific documentation
- Independent testing
- Identity confirmation
- Purity testing
- Quantity verification
- Contaminant testing, where relevant
- Storage information
- Transparent company information
- Explicit research-only positioning
How to Evaluate a GHK-Cu Research Supplier Before Ordering
Before you decide where to buy GHK-Cu peptide, run six checks on the supplier, in order. Start with the molecule, move to the purity figure, then follow the paperwork back to a named lab. Each step either adds confidence or exposes a gap, so you can stop as soon as a listing fails one.
1. Verify the Compound Identity
A product title is only a label. Look for the compound name, the molecular information, and an analytical identity result such as LC-MS, tied to a lot or reference number.
2. Check the Purity Claim
A purity percentage is the share of the sample that showed up as the main compound in the test. The method decides what that number means, and HPLC is the usual one for peptides. A bare “99% pure” with no report behind it gives you little to work with, so ask for the HPLC purity result on your own lot.
3. Look for a Lot-Specific COA
A useful certificate connects four things: Product → Lot → Test → Result. It should show the lot or batch number, test date, testing laboratory, analytical method, reported result, and product name.
4. Determine Who Performed the Testing
Supplier-generated paperwork is the seller grading its own work. Third-party testing adds an outside check, and an accredited lab adds an audited method. ISO/IEC 17025 is the standard labs use to show they produce valid results, and bodies such as A2LA issue the accreditation.
5. Check Quantity and Net Content
The label states how much material the vial should hold. A net content line on the certificate shows what the lab measured. That measurement depends on calibration, and accredited labs calibrate against reference standards through a documented chain, which NIST calls metrological traceability.
6. Review Storage and Handling Information
Follow the storage conditions the supplier states for that product. Check the specified temperature, and keep the vial sealed and away from light and moisture. Kylo’s listing, for example, gives −20 °C for lyophilized vials.
What Should a GHK-Cu COA Actually Tell You?
A GHK-Cu COA should allow a researcher to connect the tested material to the specific product lot and see what was tested, how it was tested, and what result was reported. Kylo’s four GHK-Cu certificates make good examples, because each lab reports in a slightly different way.
Identity Testing
Identity testing confirms which molecule is in the vial. LC-MS weighs it and compares the observed mass with the expected one.
On Kylo’s GHK-Cu, the Freedom and Optiq reports confirm identity by LC-MS. The Janoshik report adds a GHK figure and a copper figure, but its batch field is blank, so pair it with a lot-printed report.
Purity Testing
Look for the method, the reported figure, and the test date together. The Optiq certificate reports 99.4% by RP-HPLC, dated August 10, 2026. The Vanguard report shows >99.80% by HPLC-UV/VIS, dated August 20, 2026.
Lot Traceability
The lot number on the vial should appear on the certificate and in the supplier’s record, under the same product name. Both the Optiq and the Freedom Diagnostics reports print lot SD-260728-1, and the Freedom report carries a search code you can check with the lab.
Additional Testing
Some certificates add heavy metals, sterility, endotoxin, net content, residual solvents, or other panels. The Optiq report on Kylo’s GHK-Cu, for example, shows a pass for endotoxin, residual solvents, and heavy metals. The exact panel varies by supplier, lab, and product, so check which tests your lot received.
GHK-Cu Supplier Comparison: What Actually Separates One Listing From Another?
Two GHK-Cu supplier listings can show the same vial size and the same purity badge and still differ where it counts. Nine signals account for the gap. You can see each one on the product page or in the certificate before you spend anything.
| Factor | Weak Listing | Strong Research Listing |
| Product identification | Generic name | Specific compound identification |
| Purity | Unsupported claim | Analytical result |
| COA | Missing or general | Lot-specific |
| Identity | Not stated | LC-MS or equivalent |
| Testing lab | Unclear | Identified |
| Quantity | Basic listing | Clearly specified |
| Traceability | Limited | Lot-linked |
| Research designation | Unclear | Explicit |
| Company information | Limited | Transparent |
GHK-Cu Product Page Checklist: What to Verify in 60 Seconds
You can screen a GHK-Cu peptide listing in about a minute. Run down these ten checks before you add anything to a cart, and treat a missing item as a question for the supplier. A missing COA or identity test is a stop.
Before selecting a listing, verify:
It specifically says GHK-Cu
Research-only designation is clear
Purity specification is stated
Testing method is identified
COA is available
COA corresponds to a specific lot
Identity testing is documented
Vial quantity is clearly stated
Storage information is provided
Supplier provides identifiable company information
GHK-Cu Research Peptide Pricing: What Should You Compare?
Price is the last thing to settle, because a GHK-Cu peptide price only compares fairly when the vials behind it match. Line up the quantity, the purity specification, and the paperwork first, then look at the number. A low sticker price with thin documentation can cost a lab more in repeated work.
Compare Price Against Documentation
Two vials at the same price can come with very different evidence. Kylo lists 50 mg at $39.95, a vial size with reports from four labs, including this Freedom Diagnostics certificate. A cheaper listing with no lot-specific report leaves the identity question open.
Compare Like-for-Like Quantities
Match these before you compare:
- Vial size
- Number of units
- Purity specification
- Included documentation
- Shipping costs
Watch for Pricing That Hides the Real Comparison
A headline price can mask different quantities, different product forms, added shipping fees, narrower testing coverage, or a short promotional window. Work out the cost per milligram at the regular price, then add shipping.
On Kylo’s listing, the 100 mg vial at $59.95 costs less per milligram than the 50 mg vial. Member rates and coupon codes belong in a separate column, because they depend on terms that a one-off order may never meet.
How to Tell Whether a GHK-Cu Peptide Listing Is Research-Grade
A research-grade GHK-Cu listing is one you can verify from its documents. The term describes paperwork and analytical transparency. It says nothing about whether a material is suitable for people, and a research supplier should never suggest that it does.
| Signal | What it looks like on the page |
|---|---|
| Clear compound identification | GHK-Cu named, with formula or CAS number |
| Analytical testing | Methods named, such as HPLC and LC-MS |
| Lot traceability | Lot ID on the vial and on the certificate |
| Purity reporting | A measured figure from a dated report |
| Appropriate labeling | Storage and handling terms stated |
| Supplier transparency | Company name and contact details shown |
| Research-only designation | Stated plainly on the product page |
A listing earns the label when all seven signals are present together. One strong signal, such as a high-purity figure, cannot cover another, like a missing lot number. Read the certificate itself, because the badge on the page is only a summary.
No agency certifies the phrase, so that any seller can print it. The proof is whether a second person could repeat your check and reach the same answer from the same documents.
What Information Should You Get Before Buying GHK-Cu?
Before buying GHK-Cu, a lab should hold four sets of information: product, testing, supplier, and handling. A well-built listing already shows nearly all of it. Anything missing is worth one email, and the speed and detail of the reply tell you a lot about the supplier.
Product information
- Exact compound
- Quantity
- Purity specification
- Lot number
Testing information
- COA
- Identity testing
- Purity testing
- Testing laboratory
- Test date
Supplier information
- Company identity
- Contact information
- Research-use policy
- Shipping information
- Documentation availability
Handling information
- Storage requirements
- Product-specific handling instructions
Three questions cover what a product page usually leaves out, and they fit in a single short email:
- Which lot is shipping today?
- Which lab tested that lot, and on what date?
- Does the report measure copper as well as the peptide?
A supplier that keeps its records in order can answer all three straight from the lot file.
Ask for the certificate of the lot currently shipping, since an older report may describe a different batch. Save a copy with your purchase record, so the result stays attached to the material in your lab notes.
Kylo’s listing includes the lab and test date on each report, and the Janoshik report measures copper. The lot ID is printed on the vial, and the listing notes that certificates go up before a batch opens for sale.
Common Red Flags When Buying GHK-Cu Online
The common problems with a GHK-Cu listing show up on the listing, before checkout. A missing COA or a missing identity test is reason enough to move on. Any other single flag calls for a question to the supplier.
Red Flag #1: No COA
With no certificate of analysis, every claim on the page rests on the seller’s word.
Red Flag #2: Generic COA Not Connected to the Product Lot
A report with no lot number could describe any batch, including one sold long ago.
Red Flag #3: Purity Percentage Without Testing Method
A percentage needs its method and its test date beside it before it tells you anything.
Red Flag #4: No Identity Testing
Purity alone cannot confirm the molecule. A sample can be very pure and still be the wrong compound.
Red Flag #5: Vague Product Naming
“Copper peptide” or plain “GHK” leaves you guessing whether the vial holds the copper complex.
Red Flag #6: No Company or Laboratory Information
If you cannot find who sold the material or who tested it, you have nobody to ask when a result looks off.
Red Flag #7: Human-Use or Treatment Marketing
A research supplier keeps laboratory materials clearly apart from products marketed for personal use. Claims about results in people or usage advice suggest the seller is describing a different kind of product.
GHK-Cu Research Status and Regulatory Considerations
GHK-Cu is a copper-binding peptide studied as a research compound. Kylo’s listing describes its vial as a reference material that the FDA has not evaluated. The FDA lists GHK-Cu for injectable routes among bulk substances that may present safety risks in compounding, and notes that human data are limited.
Four points follow for a research buyer:
- Research compounds are not approved medicines by default. Being sold for laboratory work gives a material no approved status.
- Online availability proves nothing about approval. A listing shows that a supplier stocks the compound.
- Your institution’s rules apply. Check the policies that cover your laboratory and your intended work before ordering.
- Labeling and documents come first. Review both before purchase.
The agency sorts nominated compounding substances into categories on its 503A bulk substances page. Those categories can change, so check the current status on the date you order.
Compounding rules cover pharmacies that prepare medicines for patients. A research supplier works outside that system, and Kylo states on its site that it is a chemical supplier and does not operate as a compounding pharmacy.
Why Research-Only Labeling Matters When Buying GHK-Cu
A research-use-only label tells a GHK-Cu buyer what kind of product is on the page. It marks the vial as a laboratory material with a defined, limited purpose. For a lab, that one line also sets how to record, store, and review the purchase later.
| Laboratory research material | Consumer product | |
|---|---|---|
| Sold for | Laboratory research | Personal use |
| Supported by | Lot-specific analytical reports | Marketing claims and usage directions |
A supplier that states intended use is describing its product accurately. Hold the same supplier to that standard on lot numbers, test dates, and lab names. Kylo prints the research designation on its GHK-Cu product page, next to the size and the price.
A research listing is no authorization for personal use, and a careful researcher will not read it as one.
Accurate labeling also keeps sourcing transparent. When the product page, the vial, and the certificate all describe the same research material, anyone reviewing your records can see what was bought and why. The Optiq and Freedom reports on Kylo’s GHK-Cu both print the intended use on the certificate itself.
GHK-Cu Research Applications: What Can Researchers Study?
| Research area | What is examined |
|---|---|
| Peptide-metal interactions | How GHK binds copper(II), and at what ratio |
| Copper-binding behavior | Binding strength and exchange between ligands |
| Molecular characterization | Structure in the solid state and in solution |
| Analytical chemistry | Methods that separate and measure the peptide and the copper |
| Peptide stability research | How the complex holds up under stress conditions |
| Structure and function investigations | How coordination state relates to behavior |
| Laboratory assay development | Reference methods and controls |
One calorimetry study found that GHK binds copper(II) mainly in a 1:1 ratio at pH 7.4. A structural study adds that the complex forms a single unit in solution, with three nitrogen atoms holding the copper.
Stability has its own literature. A 2016 preformulation study in Pharmaceutical Development and Technology used a stability-indicating RP-HPLC method to track peptide degradation under basic and oxidative stress.
A 2026 review in Pharmaceutics reports that papers often treat GHK-Cu as one fixed ingredient, even though its coordination state can vary. A study built on an undefined sample is hard for another lab to repeat, which is why well-characterized material is worth paying for.
GHK-Cu vs. Other Copper-Associated Research Materials
GHK-Cu is one of many copper-containing research materials, and they are not interchangeable. Free GHK, GHK-Cu, related copper peptides, and simple copper salts are separate substances with separate identities. Copper appears across biochemistry in many forms, including as a cofactor for several enzymes, and with so many copper materials in circulation, the label name has to be exact.
Check five things before treating two materials as equivalent:
- Exact molecular identity. Compare the CAS number and the formula.
- Chemical composition. A complex carries copper, and the free peptide does not.
- Product designation. Read the full product name, including any salt or counter-ion.
- Analytical documentation. Look for a report that confirms the copper as well as the peptide.
- Research objective. Pick the material your protocol actually specifies.
Why Kylo Peptides Is a Research-Supplier Option for GHK-Cu
For a lab deciding where to buy GHK-Cu peptide, Kylo Peptides is our recommended GHK-Cu research supplier because you can check its listing line by line against outside lab reports. We read the product page and all four GHK-Cu certificates, and confirmed ten points from those documents.
- US-based research supplier. Orders ship from a US warehouse, and delivery is within the United States only.
- Research-only positioning. Products are sold for research, laboratory, or analytical purposes.
- GHK-Cu availability. 50 mg and 100 mg vials were both listed in stock.
- Purity target. The guarantee is ≥99% by HPLC, and each report names its method: RP-HPLC at Optiq, HPLC-UV at Freedom Diagnostics, and HPLC-UV/VIS at Vanguard.
- LC-MS identity testing. The Freedom Diagnostics report carries a mass confirmation section beside its chromatogram.
- Lot-specific COA. The Optiq report prints lot SD-260728-1, with the sample received August 3 and the result issued August 10, 2026.
- Public COA library. Certificates are listed by product, lab, and date, with a link to each report.
- Independent laboratory documentation. Third-party testing reports come from Janoshik, Freedom Diagnostics, Vanguard Laboratory, and Optiq Health Labs.
- Research catalog transparency. The listing includes the formula, weight, and both CAS numbers.
- Shipping policy. Free US shipping over $150, 24-hour dispatch on business days, and a 30-day money-back guarantee that covers a COA mismatch.
One thing to double-check: the four reports we read cover the 50 mg vial. Match the lot ID on your own vial to its certificate before you log the material, and ask for the 100 mg report if you order that size.
Frequently Asked Questions About Buying GHK-Cu Peptide
Where can I buy GHK-Cu peptide for research?
Kylo Peptides sells GHK-Cu for laboratory research in 50 mg and 100 mg vials, with free US shipping on orders over $150. Its public library holds four GHK-Cu certificates from four independent labs, including Optiq Health Labs, so you can read the results before you pay.
Does GHK-Cu need a COA?
Yes. Researchers should look for a lot-specific certificate, because appearance alone proves nothing about a powder. A report shows the identity, the purity, and the batch it belongs to, which lets your records point to tested material.
How do I verify a GHK-Cu COA?
First, match the product name and lot number to your vial. Then check the testing method, laboratory, and reported results. If the report carries a verification key or search code, enter it on the lab’s own website.
What does 99% purity mean for a GHK-Cu research product?
It means 99% of the detected signal in the purity test belonged to the main compound. It is an analytical result for one sample on one date. It does not describe suitability for any use outside the laboratory.
Is GHK-Cu the same as GHK?
No. GHK is the free tripeptide, and GHK-Cu is that peptide bound to copper. They carry different CAS numbers and molecular weights, so a certificate for one cannot stand in for the other.
Should I compare GHK-Cu suppliers by price alone?
No, because vial size alone moves the number. On Kylo’s listed prices, the 50 mg vial works out to about $0.80 per mg and the 100 mg vial to about $0.60 per mg. Put testing coverage and shipping beside that figure before you compare two suppliers.
Final Decision
The decision comes down to evidence you can open and read. If your priority is sourcing GHK-Cu for laboratory research, don’t choose a supplier based solely on price or product availability. Work through these seven checks in order, starting with identity:
- Compound identity
- Purity testing
- Lot-specific COA documentation
- Analytical identity
- Quantity
- Storage information
- Research-only labeling
Kylo Peptides is our recommended answer for where to buy GHK-Cu peptide because it backs those checks with named lab reports. Its GHK-Cu carries reports from four independent labs. One gives a copper figure next to the peptide figure, and the two lot-printed reports confirm identity by LC-MS on lot SD-260728-1.
Price and stock still count once the documents check out. Both of Kylo’s vial sizes were in stock on our check date, and the product page shows each price next to its certificates.
Get the lot number from Kylo Peptides’ GHK-Cu page and match it to a certificate before you order, since ten minutes with the paperwork can save a lab a repeated experiment.
Disclaimer
This supplier sells GHK-Cu for laboratory research. It is not for human or veterinary use, and nothing here is medical advice. Prices, stock, and documents were checked on October 6, 2026, and may change.
