Research peptides in the Czech Republic: delivery, euro prices, lab reports

Research peptides in the Czech Republic are laboratory reagents: a lyophilised solid in a sealed glass vial, identified by its amino-acid sequence and its mass, and checked by HPLC and mass spectrometry.

They are sold labelled for research, priced per vial and compared per milligram. That is the frame for everything below.

The Czech word « peptidy » covers two different worlds. One is cosmetics: serums and creams that hold a small fraction of a peptide inside a finished formula, sold per millilitre.

The other is the research vial: the pure compound, sold per milligram, with a lab report attached.

Czech searches such as « peptidy prodej », « peptidy koupit » or « peptidy eshop » mostly look for the second world, and so does this page.

Most Czech buyers search in Czech, and the Czech version of this guide, with the same catalogue and the same prices, is Peptidy v Česku: e-shop s výzkumnými peptidy.

This English page serves the labs that work in English: university groups in Prague, Brno and Olomouc, biotech teams around the Czech research campuses, and visiting researchers.

The Czech Republic also sits close to the testing side of the trade.

Janoshik Analytical, the laboratory whose reports a large share of European peptide sellers publish, is based in Prague. The OXpeptides reports for retatrutide and GHK-Cu come from that lab.

Further reading: Where to buy research peptides in Europe, Research peptides in Slovakia, Research peptides in Austria, Research peptides in Hungary and Research peptides in Portugal.

Delivery from OXpeptides to the Czech Republic takes 4 to 6 business days, and there is no customs, because the Czech Republic is inside the EU customs union.

A parcel posted from another member state crosses no customs border, so Czech customs (Celní správa) never sees it and no import VAT is due. The price on the page is the price paid.

A parcel from outside the EU is an import, whatever its value.

The EU removed the old small-parcel exemption, so even a cheap vial from outside the Union owes Czech import VAT at 21 % on the goods plus shipping.

Customs duty can apply on top, and the carrier charges its own fee for clearing the parcel before delivery:

OXpeptides parcels leave a warehouse in the European Union and are handed to a local carrier for the last mile:

The full country list is on the shipping page. One e-mail confirms the order at once, and a second carries the tracking link when the parcel leaves.

OXpeptides prices for the Czech Republic are in euros, not in Czech koruna (CZK).

Payment is by card with 3-D Secure, with no account to create, and the Czech bank converts the amount from koruna at its own rate, so the statement shows the price in Kč.

Two practical points follow. First, the euro price is fixed at checkout; only the bank's exchange rate moves.

Second, a card issued in the Czech Republic works the same way as any other European card, with the bank's own confirmation step. The product page, the basket and the checkout are in English, with prices in euros.

Peptide prices in the Czech Republic are compared per milligram, because Czech shops and social-media sellers usually quote a price per vial, « za kus », and that number hides the real cost.

A 5 mg vial and a 10 mg vial are not the same purchase. Divide the price by the milligrams on the label, then compare vials of the same size.

Inside one catalogue, the size moves the price per mg more than the shop does. OXpeptides retatrutide costs €8.99/mg in the 10 mg vial, €7.50/mg in the 20 mg vial and €6.50/mg in the 30 mg vial.

A long research series is cheaper in large vials; a short one wastes less in small ones, since the powder stays stable until the vial is opened.

In the basket, the price per vial also drops on its own from 3 and from 5 vials of the same size.

One more correction to any per-mg figure: it assumes the vial holds what the label says.

A « 10 mg » vial that holds 7 mg is the most expensive vial in the Czech Republic per real milligram, whatever the sticker.

Compare only shops that publish a lab report for the size they sell; the comparison of research peptide suppliers in Europe lines them up.

Retatrutide (LY3437943, « retatrutid » in Czech) is an investigational peptide developed by Eli Lilly. It binds three receptors of the incretin and glucagon family in laboratory models.

It is in phase 3 studies and has no marketing authorisation from the European Medicines Agency, so no authorised retatrutide product exists in the Czech Republic.

What circulates there is lyophilised powder sold as a research reagent.

For that powder, the useful document is a lab report tied to the size in the basket. The OXpeptides reports come from Janoshik Analytical in Prague, one per size:

The vials cost €89.90, €149.90 and €194.90 and are on the retatrutide 10, 20 and 30 mg page. The full guide with sizes and storage is buy retatrutide in Europe. OXpeptides publishes nothing about use in people.

Besides retatrutide, OXpeptides ships nine more research vials to the Czech Republic in the same parcel. GHK-Cu 100 mg costs €59.90 (€0.60/mg), with Janoshik report 217016 for the lot on sale (99.603 % purity).

It is glycyl-L-histidyl-L-lysine bound to a copper ion, a blue lyophilised powder measured in milligrams, a different product from the cosmetic serums that carry a fraction of a percent of copper peptide.

Its sister peptide is on the AHK-Cu page.

BPC-157 10 mg costs €54.90 (€5.49/mg); it is a synthetic chain of 15 amino acids.

TB-500 10 mg is the fragment of thymosin beta-4 that labs often order alongside it, and KLOW 80 mg combines four sequences in one vial.

MOTS-c is a 16-amino-acid peptide encoded in mitochondrial DNA, and Semax and Selank are short heptapeptides first described by Russian research institutes.

All of them ship together with the same delivery time to the Czech Republic, so a mixed order costs one shipping fee, or none above the free threshold.

Sealed research peptide vials keep best in a freezer at −20 °C, in their box, away from light and moisture.

On arrival in the Czech Republic the seal should be intact and the powder dry, as a cake or a fine powder. A vial that has thawed and frozen several times, or where the powder has clumped and turned sticky, has taken up moisture.

Bacteriostatic water is sterile water with 0.9 % benzyl alcohol as a preservative, supplied in a sealed glass vial as a laboratory diluent.

Check the words « bacteriostatic » and « 0.9 % benzyl alcohol », a sealed cap, a lot number and an expiry date. The OXpeptides one ships in the same parcel as the peptides: see bacteriostatic water.

The guide lyophilized peptides storage covers shelf life.

Further reading: Peptides in Malta.

In the Czech Republic, medicinal products are supervised by SÚKL, the State Institute for the Control of Medicinal Products (Státní ústav pro kontrolu léčiv), the national medicines agency.

SÚKL handles authorisations, inspections and market surveillance.

A product presented as meant for people, with an amount to take or a promised outcome, is a medicinal product in its eyes and needs an authorisation before it can be sold.

Research peptides have no such authorisation. That is why they can only be offered as laboratory reagents: labelled « for research use only », described by their chemistry, with no instructions for people or animals.

The line is drawn by how a product is presented, not by its name. A shop that posts usage instructions, testimonials or promised outcomes next to a vial is presenting it as a medicinal product, whatever the label says.

This page is not legal advice; each institution's own rules apply to its lab.

A peptide seller serving the Czech Republic can be checked in six steps, none of which needs an order:

1. Seller identification. Online shops selling to the Czech Republic must show a company name, an address and a registration number. A social-media profile or a messenger handle is not one.
2. A lab report per size. One PDF for the smallest vial, reused for the larger ones, says nothing about the vial being bought.
3. A verifiable report. Janoshik reports carry a task number and a key; typed on janoshik.com, they must open the same document as the shop's.
4. A measured quantity, not only a purity. « 99 % pure » on 7 mg of a « 10 mg » vial is still 7 mg.
5. Dispatch from the EU. Prices in dollars usually mean customs and 21 % VAT at the door.
6. Card payment and a written return policy. Bank transfers to a private account and crypto-only checkouts are warning signs.

The long version is how to check a peptide supplier, every line of a report is explained in Janoshik test report, and all OXpeptides reports are in the lab report library.

For laboratory research only. Not for human or veterinary use.