Guide · Consumer protection · September 2026
To verify a peptide, send a sample to an independent analytical laboratory that does not sell peptides, and order identity (LC-MS) plus purity (HPLC) at a minimum — add endotoxin and sterility if the product is intended for injection. Then verify the resulting certificate on the laboratory's own portal using the batch number on your vial. A certificate hosted only on the seller's website, or a number with no chromatogram attached, proves nothing.
This is a verification guide. It explains how to find out what is actually inside a product you already have, and how to tell a real laboratory report from a fabricated one. It is not medical advice, it is not a recommendation to buy or use any peptide, and it does not link to any seller. Products sold as “research use only” are not approved for personal use, and regulators in several countries have warned against buying injectable products outside the regulated supply chain.
Grey-market peptide vials are sold with a printed label and nothing else. No pharmacy dispensed it, no regulator inspected the line it was filled on, and nobody is legally accountable for whether the contents match the label.
Regulators in the US, UK and Canada have all issued warnings about counterfeit injectable products sold outside the regulated supply chain — including pens and vials found to contain the wrong substance, the wrong amount, or nothing active at all.
A vial labelled 10 mg that contains 6 mg still tests as high-purity material. Purity and quantity are separate measurements, and only a quantitative test catches short-fill.
The seller chooses which batch to submit, which report to publish, and how to present it. Even a genuine report from a real laboratory says nothing about the specific vial in your hand unless the batch number matches and you can look it up yourself.
The FDA has warned about counterfeit injectable semaglutide found in the US supply chain, the MHRA has issued the same warning in the UK, and Health Canada publishes guidance on unauthorised products bought online.
These are separate measurements on separate instruments. Ordering the cheapest single test and treating it as a clean bill of health is the most common mistake.
Confirms the molecule in the vial is the one on the label by matching its mass. This is the single most important test: it is what catches a substituted or entirely different compound. Some labs infer identity from HPLC retention time against a reference standard, which is weaker evidence than an intact-mass result.
Reports what percentage of the material is the target peptide versus synthesis by-products such as truncated or deletion sequences, oxidised variants and leftover reagents. Important: a clean single peak does not prove identity. Pure material can be purely the wrong thing.
Measures the actual milligrams of peptide in the vial against the labelled amount. This is what exposes underfilled vials, and it is frequently not included in a basic purity panel — check before ordering.
Screens for bacterial and fungal growth in a product intended for injection. Traditional compendial sterility testing runs on a roughly two-week incubation; faster DNA-based screens exist but are a materially different method. Ask which one the laboratory is actually running.
Endotoxins are fragments of dead bacteria that survive sterilisation and can cause severe reactions. A product can pass sterility and still fail endotoxin, so the two tests are not interchangeable.
Screens for metal residues introduced during synthesis and purification. A secondary test rather than a first purchase, but reasonable when you are evaluating an unfamiliar source.
If you only order one test, order identity. If you order two, order identity and purity. For anything intended for injection, endotoxin and sterility belong in the same order.
Pick a laboratory that does not sell peptides, supplements, or any product it also tests. If the same brand appears on both the shop and the certificate, the result is not independent.
Order identity and purity as the minimum. Add quantitative content if you want to confirm the labelled milligrams, and add sterility and endotoxin for anything intended for injection.
Book through the laboratory's own website or client portal, never through a seller who offers to arrange testing for you. You want the laboratory to receive the sample from you, and the report to be issued to you.
Each laboratory publishes its own intake address, sample size and packaging requirements. Keep the vial sealed where possible, record the batch or lot number before shipping, and photograph the vial and packaging.
A credible report includes the chromatogram or mass spectrum, the sample identifier, the test date, the method used, and the laboratory's name and address — not only a purity percentage.
Look up the report on the laboratory's own site using the task or batch reference. If there is no way to verify it independently of the seller, treat the certificate as unverified.
Record the batch number, test date and outcome so you can tie a later problem back to a specific vial, and so a refund dispute or regulator report has dated documentation behind it.
Every entry below has its own primary website and states that it accepts mail-in samples from individuals. Prices, turnaround times and accreditation claims are the laboratories’ own published claims, not figures we have independently audited — we were not able to confirm any accreditation certificate number against a public registry, so verify that yourself if it matters to you. Listing is not endorsement.
United States (Florida)
United States (California)
Canada (Ontario)
United Kingdom
Czechia — accepts mail-in samples internationally
Australia
| Laboratory | Country | Tests offered | Stated cost | Stated turnaround |
|---|---|---|---|---|
| ACS Peptide Testing Labs | United States (Florida) | HPLC purity, mass-spectrometry identity, contaminant screening | From $150 per sample (stated by the lab) | 9–11 business days (stated by the lab) |
| ILS Laboratories | United States (California) | HPLC/UPLC purity and quantitation, LC-MS, ICP-MS heavy metals, endotoxin (LAL), sterility screen | Not published — quoted through the client portal | 3–5 business days advertised (stated by the lab) |
| Peptide Test Canada | Canada (Ontario) | HPLC purity, mass-spectrometry identity, heavy metals, endotoxin | C$249 (stated by the lab) | 5–7 business days (stated by the lab) |
| PeptideVerify | United Kingdom | HPLC-UV purity, LC-MS intact-mass identity, QR-verifiable certificates | Not published at the time of writing | About 5–7 days (stated by the service) |
| Janoshik Analytical | Czechia — accepts mail-in samples internationally | HPLC purity, LC-MS/MS identity, endotoxin, heavy metals, sterility, residual solvents | Panel pricing published per test on the lab's site | Varies by panel — confirm before shipping |
| LabDoc | Australia | LC-MS identity plus quantitative purity, routed to contract laboratories | Around A$549 for the full identity and purity panel (stated by the service) | Not published at the time of writing |
A certificate of analysis is a document, and documents are easy to forge. These are the signals that separate a real report from a picture of one.
The same logic applies to the storefront itself. Run the seller’s domain through the GACS website checker and read how to check if a website is a scam before you pay anyone.
A test result is only useful if you can tie it back to a specific vial months later. Log the batch or lot number, the purchase date, the test date and the outcome. That record is what turns “I think something was wrong with it” into a documented refund dispute or regulator report.
If you are tracking several products over time, a dated tracker makes this far easier — we use DoseRoutine to keep a dated log of every product, batch and dose.
If a seller supplied a forged or unverifiable certificate of analysis, shipped a product whose test result did not match the label, or disappeared after payment, file it in the GACS scam database. Three independent reports promote an entity to the public blacklist.
Report the sellerTakes about 3 minutes. You can attach the certificate, the order confirmation and photos of the vial.
Choose an independent analytical laboratory that does not sell peptides, order an identity and purity panel through the laboratory's own site, ship a sample to the intake address it gives you, then verify the resulting certificate on the laboratory's own portal using the batch reference. Add sterility and endotoxin testing for anything intended for injection.
Identity by LC-MS is the priority, because it is what proves the vial contains the molecule on the label. Purity by HPLC comes next, followed by quantitative content if you want to confirm the labelled milligrams. For injectable products, sterility and bacterial endotoxin matter as much as purity, and heavy metals is a reasonable secondary test.
Published prices from the laboratories listed on this page range from around $150 per sample in the United States to about C$249 in Canada and A$549 for a full identity-plus-purity panel in Australia. Prices are the laboratories' own published figures and change often, so confirm on their sites before shipping.
No. Purity measures how much of the material is a single dominant compound. It does not identify that compound. A sample can report 99% purity and still be the wrong molecule entirely, which is why identity testing by mass spectrometry matters more than the purity headline.
Check whether you can verify it yourself on the laboratory's own portal using the batch reference. Then check that it shows a chromatogram or spectrum, the sample and batch identifier, the test date, the method, and the laboratory's name and address. A percentage with no instrument output, hosted only on the seller's website, is not evidence.
Treat it as a starting point, not proof. The seller decides which batch to submit and which report to publish, so a favourable result can be cherry-picked. The report only tells you about your vial if the batch number matches and you can look the certificate up on the laboratory's site yourself.
We could not confirm an independent laboratory in the rest of the European Union that accepts samples directly from individuals. Large contract laboratories run peptide assays for business clients but generally do not take consumer submissions. Rather than list unverified names, we say plainly that we could not confirm one.
Products labelled 'research use only' or 'not for human consumption' are not approved for personal use and are not made under pharmaceutical-quality standards. Rules differ by country, and regulators in the US, UK and Canada have all warned against buying injectable products outside the regulated supply chain. This guide is about verifying what is in a product, not an endorsement of buying or using one.
Work through the free GACS study books and practice drills to recognise forged documents and fake verification claims before they cost you money.
Start the free courseExternal sites referenced on this page, and the sections they relate to.
Knowing the pattern helps. Running the check takes 15 seconds and is free.
Live face-swap fraud on Zoom, WhatsApp and Teams.
Why fraudsters send victims to crypto kiosks — and the first hour.
Code demands, card draining, and how to freeze a balance.
Fake trials, auto-ship traps, counterfeit GLP-1 pens.
Independent primary sources used to check and corroborate the guidance on this page.
Official US channel for reporting internet-enabled fraud and cybercrime.
Consumer fraud reporting and published enforcement data.
UK national reporting centre for fraud and cybercrime.
Canada's central repository for fraud reports and scam alerts.
Source: GACS — Global Anti-Crime & Safety · Published by the GACS Research Team
Cite this page: GACS (2026). How to Get Peptides Tested: Labs, Tests and Fake COAs. https://gacs.app/guides/how-to-get-peptides-tested · Record ID GACS-guides-how-to-get-peptides-tested
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