Quick answer: Five European peptide suppliers have a documented history of submitting products to Janoshik Analytical, an independent Czech laboratory with a public verification portal. This guide compares them on COA transparency, EU shipping, catalog breadth, and price range. The comparison table is below; methodology and per-supplier notes follow. For research purposes only.
At-a-glance comparison table
The table below summarises the five EU-accessible suppliers that meet our Janoshik verification criteria (see methodology). Links labelled “Verify COA” point to search queries on verify.janoshik.com so you can confirm reports yourself rather than trust a screenshot.
| Supplier | Public Janoshik COAs | EU Shipping | Typical Price / Vial | Catalog Size | Verify COA |
|---|---|---|---|---|---|
| CertaPeptides (RO) | 4 published, report codes on-site | 27 EU countries, cold-chain | EUR 18 – 90 | 60+ | verify.janoshik.com |
| Particle Peptides (SK) | Per-product third-party reports published | EU-wide via DPD | EUR 16 – 60 | 16+ | verify.janoshik.com |
| PulsePeptides (UK) | Batch codes issued for Janoshik tests | EU-wide, free > EUR 150 | EUR 20 – 85 | 30+ | verify.janoshik.com |
| EuroPeptides (AT) | In-house COAs; Janoshik status not publicly documented | Fast intra-EU | EUR 25 – 95 | Research peptides + lab materials | verify.janoshik.com |
| Baltic BioLabs (EU) | Third-party HPLC/MS; COAs on request | EU-wide | EUR 18 – 75 | 45+ | verify.janoshik.com |
Prices and catalog sizes are drawn from each supplier’s public site at the time of publication (April 2026). They change frequently. Always confirm current pricing and verify any claimed COA at verify.janoshik.com before purchase. For research purposes only.
How we ranked these suppliers
Supplier roundups are only as useful as the criteria behind them. We built this list using five objective, publicly testable rules. Every supplier below meets the first two rules at minimum. Rankings reflect how many of the five they satisfy.
- Publicly verifiable Janoshik COAs. The supplier either publishes Janoshik report codes directly or makes them available on request so a researcher can look them up at verify.janoshik.com.
- EU shipping with tracked customs handling. The supplier ships into the EU single market under a documented process, not grey-market reshipping.
- Recency of testing. At least one published Janoshik report falls within the last twelve months. Older reports count as historical context, not current quality.
- Breadth of tested catalog. More than a single “hero” product has been submitted for independent analysis.
- Transparency of methodology. The supplier explains what they test, how often, and how researchers can request or verify raw data.
This post is published by CertaPeptides. We evaluated ourselves against the same five rules, and we flag where competitors have documentation we do not. See the disclosure footer at the end.
Why third-party verification matters
In-house Certificates of Analysis are the industry norm, but they share an obvious limitation: the company selling the product is also the one grading it. Independent verification removes that conflict. It is the difference between a restaurant’s self-reported hygiene score and an inspector’s report.
Janoshik Analytical is an EU-based independent laboratory. It uses high-performance liquid chromatography (HPLC) for purity, mass spectrometry (MS) for identity confirmation, and quantitative assays for peptide content. Reports are published to a public portal at verify.janoshik.com, where anyone with a report code can pull up the raw data. Janoshik is neither owned by nor contracted exclusively to any single supplier.
The practical value is stark. A 2023 analysis of research-chemical GLP-1 products in JAMA Network Open found purity discrepancies in 32 of 57 samples tested, a reminder that unverified purity claims carry real analytical risk for research work [1]. Foundational peptide literature, including Sikiric and colleagues’ 2011 characterisation of BPC-157, specifically assumes correctly identified material [2]. Without identity confirmation, a researcher is comparing their bench results against a paper written about a different molecule.
Third-party testing does not guarantee every future batch. It does two narrower things: it confirms the sample tested was what it claimed to be, and it shows the supplier was willing to let an outside lab look.
1. CertaPeptides (Romania)
Location: Romania (registered as CERTALAB S.R.L., CUI 54169956)
Catalog: 60+ research peptides plus lab accessories
Shipping: 27 EU countries with cold-chain packaging
Janoshik status: 4 reports published March to April 2026, codes listed on certapeptides.com/quality
CertaPeptides publishes every Janoshik report code it receives on a dedicated quality page, and each product also carries an in-house COA from HPLC and mass spectrometry work. The four Janoshik-verified products live-linked as of April 2026 are Retatrutide 5 mg (99.70% purity, 5.79 mg actual content), Ipamorelin 10 mg (99.77% purity, 10.02 mg), Selank 10 mg (99.79% purity, 11.56 mg), and Epitalon 50 mg (98.01% purity, 45.31 mg). Each report is independently verifiable at verify.janoshik.com using the codes published on-site. You can read what Janoshik found in our products for the full write-up.
Strengths
- Report codes are on the public quality page, no request needed.
- Full batch lookup available at certapeptides.com/coa, including chromatograms and endotoxin data.
- Catalog breadth (60+) lets researchers consolidate orders.
- EU-registered entity with a visible corporate registration.
Limitations
- Only 4 products submitted for Janoshik review so far. The rest of the catalog relies on in-house COAs.
- No long-run history of repeat third-party testing yet, since the Janoshik programme started in 2026.
Verify their COAs at verify.janoshik.com.
2. Particle Peptides (Slovakia)
Location: Slovakia, EU
Catalog: 16+ injectable research peptides
Shipping: EU-wide via DPD, international available
Third-party testing: Independent analysis published on individual product pages
Particle Peptides has been operating since 2015 and publishes third-party analytical reports on product pages rather than offering only summary COA sheets. Their documentation set typically covers purity, identity, peptide content, endotoxins, heavy metals, and bioburden, which is broader than most EU peers. Their pricing band (roughly EUR 16 to 60 per vial) sits at the lower end of the EU market.
Strengths
- Long operating history in the EU peptide space.
- Per-product analytical reports rather than generic COA PDFs.
- Visible Trustpilot and community presence for third-party sentiment.
Limitations
- Narrow catalog (16+) limits one-stop research purchasing.
- Specific Janoshik report codes are not always discoverable without contacting support, which adds a step when independently verifying claims.
Verify their COAs at verify.janoshik.com.
3. PulsePeptides (United Kingdom)
Location: United Kingdom
Catalog: 30+ peptides
Shipping: EU-wide, free over EUR 150
Janoshik status: Batch-level Janoshik codes issued with orders
PulsePeptides was founded in 2021 and specifically nominates Janoshik as its third-party lab. Each batch ships with a unique Janoshik verification code so researchers can confirm the test at the report portal rather than take a PDF on faith. Their catalog focuses on the most widely studied compounds (BPC-157, TB-500, GHK-Cu, Ipamorelin, CJC-1295), and shipping is free on EU orders above EUR 150. GHK-Cu studies such as Pickart et al. (2015) rely on correctly identified material, which is exactly what a Janoshik code on a batch is supposed to confirm [3].
Strengths
- Janoshik codes tied to each batch, not just flagship products.
- Clear EU shipping thresholds and tracking.
- Catalog covers the most commonly researched compounds.
Limitations
- Trustpilot feedback is mixed on express shipping handling, worth reviewing case by case.
- UK location means post-Brexit customs handling varies by destination country.
Verify their COAs at verify.janoshik.com.
4. EuroPeptides (Austria)
Location: Austria, EU
Catalog: Research peptides and lab materials
Shipping: Fast intra-EU
Testing: Batch-level in-house COAs; Janoshik status not publicly documented at the time of writing
EuroPeptides is an Austrian-based supplier that publishes batch COAs and markets its products to university and laboratory buyers. We include them because they meet the EU shipping and documentation criteria, but we flag that we could not confirm a public Janoshik programme during research. A researcher who wants Janoshik verification from this vendor should request the report code directly.
Strengths
- EU-to-EU shipping tends to be fast and customs-light.
- Batch-level COAs available for all products listed.
- Explicit research-use framing.
Limitations
- No public Janoshik report index found at time of writing.
- COA methodology disclosure is thinner than Particle Peptides or CertaPeptides.
Verify their COAs at verify.janoshik.com.
5. Baltic BioLabs (Baltic EU region)
Location: Baltic EU region
Catalog: 45+ research peptides
Shipping: EU-wide
Testing: Third-party HPLC and mass spectrometry, COAs available on request
Baltic BioLabs has been serving EU research buyers since 2020. They describe a third-party HPLC and MS workflow and provide COAs on request. Their catalog (45+) is the second largest in this roundup after CertaPeptides. Pricing sits in the mid-range for the EU market.
Strengths
- Broad catalog of 45+ peptides.
- Third-party HPLC and MS described on site.
- Competitive EU pricing band.
Limitations
- COAs on request rather than on-page adds friction for independent verification.
- Specific Janoshik report codes are not listed publicly at time of writing.
Verify their COAs at verify.janoshik.com.
How to verify a Janoshik COA yourself
Screenshots are trivial to fake. The portal lookup is not. Any supplier that claims Janoshik verification should be able to produce a report code that resolves at verify.janoshik.com.
- Open verify.janoshik.com in your browser.
- Enter the report code the supplier lists (or emails you on request).
- Confirm that the compound name, batch identifier, test date, purity percentage, and measured content all match the product you are buying.
- Cross-check the test date against the batch code you are actually receiving. A valid report from 2024 is not a valid report for a batch produced in 2026.
If the portal fails to resolve the code, or the supplier cannot produce one at all, the claim is not verifiable. That does not automatically mean the product is bad, but it does mean you cannot call it “Janoshik verified” in your own notes. For a broader framework see our post on supplier legitimacy checks.
Can suppliers fake Janoshik COAs?
Yes. PDF editors can alter a screenshot, and counterfeit report cards have been reported in community discussions. That is precisely why the portal exists. A “Janoshik COA” that does not resolve on verify.janoshik.com is not a Janoshik COA, it is a design template. The correct posture is to treat any supplier-hosted PDF as a pointer to the portal, not as the primary source of truth.
Researchers on community forums have converged on a simple workflow: always resolve the code, and flag any supplier whose code lookup fails. This sets the cost of a fake COA higher than the cost of an honest one, which is the dynamic the portal is built to enforce.
How much does Janoshik testing cost, and is it legitimate?
Janoshik operates as an independent lab with published pricing for HPLC, MS, and quantitative analyses. The cost to test one peptide is measured in tens of euros per assay, low enough that any supplier with a real catalog can afford to test their hero products. Legitimacy is established two ways: the EU business registration, and the existence of the public verification portal itself. A fake lab does not build a public-resolving report system; it would defeat the purpose.
The Janoshik programme is not a regulatory seal. It is an analytical cross-check. That distinction matters: Janoshik tells you whether a sample matches its claim, not whether the supplier’s manufacturing process is GMP-audited. For research peptides, the identity-plus-purity check is the most load-bearing question, which is why this roundup focuses on it.
Key takeaways
- Independent verification via Janoshik Analytical removes the conflict of interest that comes with in-house-only COAs.
- CertaPeptides is the only supplier in this roundup that publishes Janoshik report codes directly on its quality page and also exposes batch lookup through a dedicated COA portal.
- Particle Peptides brings the longest EU track record and the broadest per-product analytical disclosure.
- PulsePeptides ties Janoshik codes to individual batches rather than only to hero products.
- EuroPeptides and Baltic BioLabs meet the EU shipping and documentation criteria but require researchers to request Janoshik codes directly.
- Always resolve report codes at verify.janoshik.com. Screenshots are not evidence.
- For a wider view of the market beyond the Janoshik-verified subset, see our broader supplier comparison, or browse our Janoshik-tested catalog.
Frequently asked questions
Q: How do I verify a Janoshik COA?
A: Go to verify.janoshik.com, enter the report code the supplier provides, and confirm the compound, batch, test date, purity, and measured content match what you are ordering. If the code does not resolve, the COA is not verifiable.
Q: Are Janoshik COAs faked anywhere?
A: PDFs can be altered, which is why the verification portal exists. A screenshot is not a COA. A report code that resolves on verify.janoshik.com is. Treat any supplier-hosted PDF as a pointer to the portal, not the primary source.
Q: Which European peptide suppliers post their Janoshik tests publicly?
A: As of April 2026, CertaPeptides publishes its Janoshik report codes directly on its quality page. PulsePeptides issues batch-level Janoshik codes with orders. Particle Peptides publishes per-product third-party reports. EuroPeptides and Baltic BioLabs publish in-house COAs and will provide Janoshik information on request where available.
Q: Is Janoshik testing legitimate?
A: Janoshik Analytical is an EU-registered independent laboratory that uses HPLC and mass spectrometry and publishes reports to a public portal. Its reports can be independently resolved by any buyer, which is the practical definition of independence in this context.
Q: How much does Janoshik testing cost for a supplier?
A: Janoshik publishes its own pricing. Per-assay costs are low enough that any serious catalog can afford to submit its hero products. The barrier to testing is usually willingness, not price.
Q: Are these suppliers legal to purchase from in the EU?
A: Research peptides sold strictly for laboratory and scientific research are broadly available in most EU countries, but rules vary. All suppliers in this roundup frame their products as research-use-only. Researchers should verify the rules in their own jurisdiction before ordering.
Publisher disclosure
CertaPeptides publishes this list. Our inclusion criteria are objective (publicly verifiable Janoshik COAs, EU shipping, recency, breadth, transparency) and we evaluated ourselves against the same criteria. Where competitors have documentation we do not, we say so in their limitations. Where we have documentation they do not, we say so in ours. Rankings are our editorial call based on how many of the five criteria each supplier currently satisfies. For research purposes only.
References
- Cohen PA, et al. (2023). Quantity of Semaglutide, Tirzepatide, and Retatrutide in Products Sold as Research Chemicals. JAMA Network Open. 2023;6(8):e2330490. PMID: 37594764. Independent analysis found purity discrepancies in 32 of 57 samples, underscoring the value of third-party verification such as Janoshik.
- Sikiric P, Seiwerth S, Rucman R, Turkovic B, et al. (2011). Stable gastric pentadecapeptide BPC 157: novel therapy in gastrointestinal tract. Current Pharmaceutical Design, 17(16), 1612 to 1632. PMID: 21548867. Foundational characterisation of BPC-157 demonstrating the value of identity-verified research peptides.
- Pickart L, Vasquez-Soltero JM, Margolina A. (2015). GHK Peptide as a Natural Modulator of Multiple Cellular Pathways in Skin Regeneration. BioMed Research International, 2015, 648108. PMID: 26236730. Demonstrates reproducible results with correctly characterised GHK-Cu research peptides.
This article is for educational and research purposes only. All products mentioned are intended strictly for laboratory and scientific research, not for human consumption. The information provided does not constitute medical advice. Always consult qualified professionals and verify local regulations before purchasing research compounds. Supplier mentions are based on publicly available information at the time of writing and do not constitute endorsements. Catalog sizes, pricing, and COA availability change frequently, confirm current details at each supplier’s site and at verify.janoshik.com before purchase.