The laboratory publishes its prices on its own website. Which means you can work out, in about a minute, whether a seller's testing claim is affordable or decorative.
What the words cost, published
Janoshik Analytical public price list, September 2026
"Lab tested" is the cheapest sentence in this market. Writing it costs nothing.
It appears on peptide sites everywhere, often near a badge. Some name the laboratory and some do not, and that difference is the whole point.
There is a simple reason it is everywhere. The words are free. The test is not.
And because the laboratory publishes its own price list, in public, on its own website, you can check the arithmetic yourself.
Here are real prices from Janoshik Analytical, a laboratory named by three of the four sellers whose certificate libraries we opened. These are taken from its public list of peptide tests.
| Test | Price |
|---|---|
| BPC-157 analysis | 215 USD |
| GHK (or GHK-Cu) analysis | 290 USD |
| Tesamorelin analysis | 290 USD |
| Common GLP-1 peptide blind test | 360 USD |
| MOTS-c analysis | 450 USD |
| Oxytocin analysis | 450 USD |
Seventy three peptide tests are on that list. The cheapest is 215 dollars. The most expensive is 800. There is no budget option.
Now put that next to a vial.
Retatrutide starts at 105 dollars at one of the sellers compared here. The cheapest test on the laboratory's own list is 215 dollars.
So the cheapest possible test on one batch costs about twice what a vial brings in. Not twice the profit. Twice the whole price, before anything is deducted.
That is per batch, per compound. A seller with ten compounds who genuinely tests each new production run is paying somewhere around three thousand dollars every time the stock turns over.
Real testing is a serious running cost, not a badge. And once you know the number, several things about this market stop being mysterious.
Why one certificate gets reused across a whole product line. Testing one compound and showing that document everywhere costs 215 dollars once. Testing all of them costs thousands, repeatedly.
Why so many certificates show only purity. The cheaper tests answer less. A test that also identifies the compound and measures the amount sits higher up the price list.
Why "lab tested" is usually the whole claim. Naming the lab invites a reader to go and look at what that lab charges, and then at whether the seller could plausibly have paid it for every product on the shelf.
None of that proves any particular seller is lying. It explains the shape of the market, which is a more useful thing to understand.
Twenty sellers / 11 September 2026
Run this arithmetic across a category and the spread stops being an opinion about quality.
We probed twenty sellers on 11 September 2026 and opened four of their libraries in full. What they publish ranges further than any marketing page would suggest. One publishes nothing at all. One publishes 121 documents. The distance between them is not a difference of opinion about quality. It is a difference in what somebody was willing to spend.
The blind test on that list, at 360 dollars, is not the cheapest way to answer the question. It is the test where the lab is not told what the sample is and has to identify it.
Count the products on a shop and count the certificates. The gap between those two numbers is a bill somebody either paid or did not, and the price list above tells you roughly what it came to.
If you are looking at one of those four, you should weigh that. We would rather tell you than have you find out by looking.
The six that are covered are covered properly, and the report for each is checkable against the laboratory's own records rather than only against a file we host.
This works on anyone, including the sellers this site links to.
A named laboratory. A certificate for each product, or an honest statement about which products do not have one yet. Batch numbers that match what is on sale. None of that requires a seller to be large. It requires them to have actually spent the money.
A seller who lists twenty compounds, claims every batch is tested, and publishes two certificates is making a claim you can price. It does not mean they are dishonest. It means the claim and the evidence are different sizes, and you are entitled to notice.
Janoshik / one laboratory's prices
Some honest caveats, because this page is an argument from arithmetic and arithmetic can be pushed too far.
What the arithmetic does give you is a way to sense check a sentence that everybody writes and almost nobody prices.
Price the claim on whoever you are considering, then run the same arithmetic on the seller this site links to. The certificate guide is where each field is explained.
Every seller looks the same on the good day. Four things decide what happens on the bad one, and all four are published before you order if you go and read them.
Read the seller's own published pages, not their marketing, and none of these terms were written by us.
We will send the pricing check as a one page sheet, in plain language, so you can run it on any seller and any laboratory, with the published lab prices beside each test.
You are on the list.
The sheet comes by email, as one page you can print.
It follows once our list is live, and nothing else is sent. We do not sell peptides and we are not going to email you about any.
One email with the sheet. Unsubscribe in one click. We do not share addresses.
Before you go
One sheet, in plain language, that you can run on any seller in any country. One column filled in from a published certificate, and one left empty for the seller you already have open.
You are on the list.
The sheet comes by email, as one page you can print.
Nothing else follows it. We do not sell peptides and we are not going to email you about any.
One email with the sheet. Unsubscribe in one click. We do not share addresses.