How to check whether a research peptide supplier is legitimate
Nine checks you can run on any peptide shop in ten minutes: what to ask for, what a refusal means, and how this one answers — each row with its source.
1 October 2026 · 6 min read
Semaglutide - 5mgLast checked: 1 October 2026. Every number on this page is printed in one of the four sources listed at the bottom, and every statement about this shop is one we publish elsewhere on the same site — linked, not paraphrased. If a row here disagrees with the page it links to, the linked page is the one that counts, and we would like to hear about it.
The market this shop sits in has a specific problem: almost every seller says the same two words. A 2024 study that bought semaglutide from six online vendors serving the search results found that the measured purity of the vials was 14.37%, 8.97% and 7.7% while the documentation claimed “at least 99%”, and the semaglutide content exceeded the labelled amount by 28.56% to 38.69% (JMIR 2024;26:e65440). Three of the three Ozempic pens bought from those vendors never arrived at all — the study calls it a non-delivery scheme.
So “lab tested” is not a check. It is a phrase. This page is the check.
Everything sold here is for in-vitro laboratory research. Nothing below is a recommendation to take anything, and no page on this site carries a dose.
The nine checks, and how this shop answers each one
The middle column is deliberately blunt. A refusal, a vague answer or a missing page is information in itself — that is what the first study rated websites on: whether a prescription requirement was indicated, whether sufficient product information was given, whether the vendor’s address and location appeared on the website, and whether a valid regulatory certification, logo, seal or registration could be found.
| # | What to ask for | What it looks like when the answer is no | How Peptheon answers |
|---|---|---|---|
| 1 | A named entity, a contact address and a company registration | A contact form that goes nowhere, a “support” chat with no company behind it | We publish the entity name and a live mailbox (contact), but our registered address and company number are still marked as pending on the policy pages. That gap is ours and we are naming it |
| 2 | The manufacturer, named on the product page | “Premium European lab”, “our own synthesis”, or a logo instead of a name | Every product page names the maker — Nordic Peptides, Med Care Pharma, Marvel Nutrition or PharmaRx — and the box arrives in that maker’s own sealed packaging (who made your box) |
| 3 | Whether the substance is sold as a medicine or as a research material | Health claims on the product page, a dosing guide, a “cycle” | Ours is sold strictly for research use. Per Directive 2001/83/EC Art. 1(2)(d), a substance presented for treating or preventing disease in human beings is a medicinal product; we make no such presentation and write no protocol |
| 4 | A batch certificate of analysis with a lot number, a date, a method and a result as a number | “Lab tested” with no document, or a report you cannot re-check | Nine Janoshik reports, all from Med Care Pharma, transcribed onto the relevant product pages (how to read one). The other three manufacturers publish none, and our product pages say so instead of implying otherwise |
| 5 | A purity figure that came from a named laboratory | “99%+ pure” written on a product page by the seller | We publish no purity figure of our own. The number belongs to the manufacturer and the laboratory, and where neither publishes one, neither do we |
| 6 | A physical address, a shipping region and a temperature the label actually states | Ships worldwide from a location the page will not name; “ships on dry ice” for something stored at room temperature | European Union only, tracked, in a plain unbranded box, at room temperature because that is what the manufacturers specify (storage and handling) |
| 7 | A payment route that leaves a record | Only irreversible or untraceable methods; a discount for paying in a way nobody can reverse | Bank transfer with your order number as the payment reference, or crypto invoiced to an exact amount (how payment works). One flat €20 fulfillment and delivery fee per order (shipping and delivery) |
| 8 | Reviews that can be traced to a real order | Star ratings no account is attached to, testimonials on a stock image | Ratings come only from customers with an account and are published only after manual approval. Nothing is seeded, imported or bought |
| 9 | What happens if the item is wrong, damaged or close to expiry | “All sales final” above the checkout | 14 days for wrong, damaged, missing or near-expiry items, return postage on us; nothing opened or reconstituted (returns) |
The checks that matter most, in order
Who made it (2, 3, 5). If a shop will not tell you who manufactured the material, there are only two explanations: it does not know, or it would rather you did not. The same applies to the regulatory question. Our position is written down: we are a reseller, we do not synthesise or repack anything, and the descriptions and dosing on our product pages are the manufacturers’ own text published as written — not our claims.
Whether the document exists (4). A certificate of analysis is a statement about one batch, on one day, from one laboratory. Without a lot number it describes nothing; without a date it is history. The best labs publish a verification key so a stranger can re-check the report — Janoshik does, and the nine reports on our product pages were transcribed from there.
What a “research use only” label is worth (3, 6). In the 2024 study, two of the vendors sold lyophilised vials labelled “research use only” on the ampoule and company logo, while the same pages described weight loss, diabetes and appetite reduction as the point of the product. The label was real; the marketing around it was not. A research-only label is a statement about what the material is authorised for, not a quality claim and not a prohibition on anyone misusing it.
Whether you can get your money back (7, 9). Four of the six vendors in that study offered untraceable payment methods, and two of them were actively incentivised with a 5% discount or free shipping for paying that way. A shop that only accepts a route you cannot reverse is telling you something about what it expects to happen after the payment.
What this page cannot settle
Honesty has a cost, so here is ours.
- An analysis covers one batch. Even a real, verifiable COA says nothing about the next batch, or about a different product from the same maker.
- Where a manufacturer publishes nothing, there is nothing to check. We do not manufacture, so we cannot commission a report on a maker’s behalf. For three of our four manufacturers the honest answer is: no published report exists. We would rather print that than print a badge.
- The strongest check happens before you pay. If the answer to row 4 is “ask us after ordering”, you have your answer already.
The sources, and what each one is good for
- Multifactor Quality and Safety Analysis of Semaglutide Products Sold by Online Sellers Without a Prescription — J Med Internet Res 2024;26:e65440. The measured purity figures, the content overshoot, the endotoxin levels, the payment-method pattern and the four website-assessment criteria all come from this paper.
- Directive 2001/83/EC, Article 1(2)(d) — the definition of a medicinal product in EU law, used in row 3.
- Falsified medicines: overview — EMA — what falsification means, that such products “do not pass through the usual evaluation of quality, safety and efficacy”, and the EU’s safety-feature and distribution-practice rules behind rows 1 and 6.
- Janoshik Analytical verification — the public re-check page behind row 4.
If you want the buying version of this — pens versus vials, what a bundle actually contains, how an EU order moves — start with the ten-minute buying checklist and then come back here with a candidate shop in hand. The full catalog is on the next page if you want to see what a named manufacturer looks like in practice.
References.
- Multifactor Quality and Safety Analysis of Semaglutide Products Sold by Online Sellers Without a Prescription. J Med Internet Res 2024;26:e65440 (full text, PMC11582493).
- Directive 2001/83/EC, Article 1(2)(d) — definition of a medicinal product. EUR-Lex.
- Falsified medicines: overview — European Medicines Agency.
- Janoshik Analytical — public report verification.
