Research peptides in Croatia: delivery, prices in euros, lab reports

A search for peptides in Croatia mixes two worlds on the same page. One is cosmetics: serums and creams with a small share of peptide, sold per millilitre.

The other is research peptides: the pure compound in a sealed glass vial, a lyophilised solid measured in milligrams and backed by a laboratory analysis. The two cannot be compared on content or on price.

Most Croatians search in Croatian: « peptidi », « peptidi Hrvatska », « retatrutid » or « BPC 157 Hrvatska ».

The Croatian version of this guide, with the same catalogue and the same prices, is Peptidi u Hrvatskoj: retatrutid, BPC-157 i GHK-Cu.

This page is in English for the labs that work in English: university groups in Zagreb, Split, Rijeka and Osijek, biotech teams, and visiting researchers.

A research peptide is a laboratory reagent: a short chain of amino acids, made by solid-phase synthesis, purified by HPLC and freeze-dried.

It is identified by its amino-acid sequence and its mass, checked by HPLC and mass spectrometry, sold labelled for research, priced per vial and compared per milligram. That is the frame for everything below.

The product page, the basket and the checkout are in English, with prices in euros.

Further reading: Where to buy research peptides in Europe, Research peptides in Slovenia, Research peptides in Hungary, Research peptides in Austria, Research peptides in Ireland and Research peptides in Romania.

Croatia is a member of the European Union, of the EU customs union and of the euro area.

A parcel posted from another member state crosses no customs border, so Croatian customs never sees it and no import VAT is due.

Prices are in euros, so there is no currency conversion either: 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 Croatian import VAT at 25 % 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 the national post for the last mile:

Payment is in euros by card with 3-D Secure, with no account to create. One e-mail confirms the order at once, a second carries the tracking link when the parcel leaves. The full country list is on the shipping page.

Peptide shops and social-media sellers in Croatia usually quote a price per vial.

That number hides the real cost, because 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. Retatrutide at OXpeptides 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 Croatia per real milligram, whatever the sticker. Compare only shops that publish a lab report for the size they sell.

In Croatia, medicinal products are the remit of HALMED, the Agency for Medicinal Products and Medical Devices.

A product offered to people, with an amount to take or a promised outcome, is a medicinal product in its eyes and needs a marketing 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.

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

The World Anti-Doping Agency list names BPC-157 (class S0) and TB-500 (class S2) as prohibited, which matters for any lab that works with sports organisations.

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

Retatrutide (LY3437943) is an investigational peptide developed by Eli Lilly. In laboratory models it binds three receptors of the incretin and glucagon family.

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

What circulates in Croatia, where « retatrutid » is the most searched peptide term, 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, one per size:

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

BPC-157 ships to Croatia from the EU as a research reagent: BPC-157 10 mg costs €54.90 (€5.49/mg) at OXpeptides. The compound has a Croatian history.

This pentadecapeptide, a synthetic chain of 15 amino acids derived from a sequence of a protein found in gastric juice, was first described by a research group at the University of Zagreb, which explains why « BPC 157 Hrvatska » is a common search in the country.

After retatrutide and BPC-157, these are the vials Croatian labs add to the same order.

TB-500 10 mg is the fragment of thymosin beta-4 that labs often study alongside it, and KLOW 80 mg combines GHK-Cu, BPC-157, TB-500 and KPV in one vial.

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

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

Search « GHK-Cu » in Croatia and most of the first page is cosmetics: creams and serums where the copper peptide appears as Copper Tripeptide-1 and makes up a fraction of a percent of a finished formula.

A research vial holds the peptide itself, glycyl-L-histidyl-L-lysine bound to a copper ion, as a blue lyophilised powder measured in milligrams.

The two are priced differently: a serum per millilitre of product, a vial per milligram of peptide.

GHK-Cu 100 mg at OXpeptides costs €59.90 (€0.60/mg), with Janoshik report 217016 for the lot on sale (99.603 % purity). Its sister peptide is on the AHK-Cu page, and GHK-Cu vs AHK-Cu compares them.

Every published report is in the report library.

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.

On arrival the seal should be intact and the powder dry, as a cake or a fine powder.

Sealed vials keep best in a freezer at −20 °C, in their box, away from light and moisture. The guide lyophilized peptides storage covers shelf life.

Six checks on a peptide seller from Croatia, none of which needs an order:

1. Company details. Online shops serving Croatia 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 25 % 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 shops are compared side by side in the best research peptide suppliers in Europe.

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