Where to Buy GHK-Cu in the USA: A Buying Guide

Researchers sourcing GHK-Cu in the United States are buying two things in one vial, a tripeptide and the copper ion it holds, and a vendor’s paperwork has to account for both. This buying guide, not a product page, is for laboratories ordering domestically: it describes the complex in chemical terms, lists what a certificate for a copper complex should report, prices our 50 mg and 100 mg vials and the KLOW blend per milligram in US dollars, and compares a parcel from Utah with an import.

What GHK-Cu is

GHK is glycyl-L-histidyl-L-lysine, a three-residue peptide. GHK-Cu is the same tripeptide coordinated to a copper(II) ion. The two are distinct substances with their own formulas, masses and registry numbers.

The copper adds roughly 62 g/mol, enough for a mass spectrum to tell the two apart. We stock GHK-Cu on exolabz.co as a lyophilized research material in 50 mg and 100 mg vials; it is also the biggest single component of the KLOW Peptide Blend 80 mg, where 50 mg of GHK-Cu sits alongside 10 mg apiece of BPC-157, TB-500 and KPV. The GHK-Cu USA hub is the index for our articles on the complex, and our note on copper coordination in GHK-Cu describes which atoms of the peptide bind the metal.

What a copper-complex report should show

A certificate written for a free peptide and applied to GHK-Cu leaves part of the material undescribed. We would look for six things.

1. A named laboratory and a method section. Without the method, no one can tell whether the complex was analyzed intact or came apart on the column.
2. An observed mass that matches the complex. Mass spectrometry should show a value near 402.92 g/mol, not 340.38. A report whose mass matches the free tripeptide has characterized GHK, not GHK-Cu.
3. HPLC purity with the wavelength printed. GHK has no tryptophan, tyrosine or phenylalanine, so a purity read at 280 nm has almost nothing to measure; the chromatogram should state a wavelength where the peptide absorbs.
4. Copper content from a separate determination. Peptide purity by HPLC is a statement about the peptide fraction and says nothing about how much copper is present; that figure has to be measured on its own.
5. Water content by Karl Fischer titration. The label mass is gross: copper, counter-ion and residual water are all in it, and the water held by a freeze-dried solid is measured rather than assumed; our Karl Fischer article covers the method.
6. Batch photographs. Our vials carry no printed lot number, so a report is matched to a vial by cap color and crimp color against the photographs published with it.

Two further points. The complex can partly dissociate during chromatography, so two laboratories running different methods can report different numbers for one vial. And the blue color is a signal, not a measurement: a paler solid is worth asking about, but a shade is not a percentage. We do not currently have a published GHK-Cu report to cite here. Published certificates for tested lots, each accompanied by batch photographs, are on the certificates page, and GHK-Cu registry numbers, masses and the complex tabulates the values a report for this material should be checked against.

GHK-Cu cost per milligram in USD

List prices on exolabz.co as of 28 October 2026; the 10+ figures use the cart’s 25% tier. The KLOW row is divided by the blend’s full 80 mg label, not by its 50 mg of GHK-Cu.

Two 50 mg vials come to $85.98 against $75.99 for one 100 mg vial, so the larger size is $0.10 cheaper per milligram, while the smaller size suits a laboratory that opens a vial infrequently. Either way the per-milligram figure is the one to compare, because it is the only number that survives a change of vial size or vendor; the US price list orders our whole catalog by it, and comparing research peptide prices per milligram explains the gross-versus-net caveat.

Dispatch from Utah, or an import

An exolabz.co order is dispatched from our Utah facility as a tracked FedEx Express domestic parcel in plain-label packaging. We deliver only to US addresses, across all fifty states, Alaska and Hawaii included, and Puerto Rico. No border is crossed, so no customs declaration, duty or brokerage fee attaches to the order. Dispatch is usually within one business day of confirmation; an order after the day’s cut-off joins the next dispatch, and one placed late on Friday goes out Monday. From dispatch, parcels typically arrive in 1–2 business days in the Mountain and Pacific states, 2–3 in the Midwest, Texas and the South, 3–4 in the Northeast and New England, and take longer to reach Alaska and Hawaii; these are typical figures, not a guarantee. Shipping is free on orders over $200 USD and calculated at checkout below that; see where we ship and the shipping policy.

An order placed with a vendor outside the United States differs at three points: the price is in a foreign currency and your card’s exchange rate decides what you pay, international shipping is charged on a different basis, and the parcel can be held for inspection when it enters the country, a delay with no fixed length. Importing research chemicals into the US vs domestic ordering sets the two routes against each other in detail.

Payment

Credit card and cryptocurrency are the two payment options on exolabz.co. The price does not move with the method. Each is described on the payment methods page.

Quantity pricing for GHK-Cu

The cart applies the tiers without a code and counts vials across every product in it, so one GHK-Cu vial and one KLOW vial together already reach the 5% tier.

A first-order or win-back code from one of our emails is applied on top of the tier; a holiday sale code at 30% off list is applied instead of the tier for as long as it stays in the cart. For more than ten vials, request a quote through the bulk orders page.

Keeping GHK-Cu after delivery

GHK-Cu ships at ambient temperature because the lyophilized solid is stable over normal transit. After delivery, store the sealed vial at 2–8 °C, protected from light and moisture, and bring it to room temperature before the first opening so that water from the air does not condense onto the cold solid; close it again promptly, since the freeze-dried material takes up moisture. Inside 7 calendar days of delivery, count the vials against the order, compare cap and crimp colors with the batch photographs on the report you mean to rely on, look at the glass and the seal, and note whether the solid is the blue you expect. A damaged or incorrect item reported in that window with photographs is replaced or refunded under the refund and returns policy. The full arrival checklist is receiving a research peptide shipment.

Five checks to run on any GHK-Cu vendor

• Does the report’s observed mass match the copper complex, near 402.92 g/mol, or the free tripeptide, near 340.38 g/mol?
• Is copper content reported as a separate measurement, or is HPLC peptide purity the only figure on the page?
• Is the detection wavelength printed, and can a peptide with no aromatic residues be seen at it?
• Is the laboratory named, is there a method section, and do published batch photographs let a vial be matched to the report?
• If a test you commission comes in under the certificate’s specification, what does the vendor do about it? Under our purity guarantee, the product and the testing fee are both refunded once the unused material comes back with the lab report.

Choosing a research peptide supplier in the USA gives the general version of this list, and how to read a peptide certificate of analysis walks through a report section by section.

Product pages and further reading

The two single vials are GHK-Cu Copper Peptide 50 mg and GHK-Cu Copper Peptide 100 mg; the blend is the KLOW Peptide Blend 80 mg. Our articles on the complex are indexed on the GHK-Cu USA hub, the blend on the KLOW USA hub, and GLOW vs KLOW sets out how the two blends differ. Ordering questions are answered on the FAQ; for anything else, use the contact page.

All products are sold for laboratory research use only and are not for human or animal use.