How we score suppliers
Every supplier on Peptide Scanner gets a score out of 100. Below is where each point comes from, with the actual cut-offs, so you can check our work.
The most any supplier can score today, because we haven't lab-tested anyone yet.
The highest reputation mark a supplier can get after a credible scam report.
Reviews a supplier needs on our site before they count at all.
Certificate points for a supplier whose only lab reports are its own.
Four parts, 100 points
Each part measures something different. Pick one to see how it's worked out.
Why nobody can pass 60 yet
40 points are for our own test. We buy a vial like any customer would and send it to an independent lab, which checks what's inside and how pure it is. We haven't finished testing any supplier, so every score on the site is out of 60 for now, and the score box says so next to the number.
Every supplier today
How a tested supplier will look (example, not a real result)
Outside reviews, 20 points
We read the supplier's rating and review count on independent external review sites. More reviews and a higher rating score higher. A supplier with only a handful of reviews is capped, so a few five-star reviews can't carry it. We don't publish the exact cut-offs here: they would tell a supplier how many fake reviews to buy.
What people say after they order
This part is reputation. It has two inputs, each marked out of 10: what we find about the supplier around the internet, and the reviews our own users leave on its page.
Internet reputation
We search Reddit, forums, YouTube, blogs and scam-checker sites, read what we find, and mark it. Bad reports weigh more than good ones: once there's a credible scam report, the mark can't go above 2, however many happy customers the supplier has elsewhere.
We re-run this search every week. Each supplier's page says what we found and why it got its mark.
Reviews on Peptide Scanner
These count for nothing until a supplier has 10 reviews here, so one review, or one angry customer, can't move the score. After that, the mark is points for how many reviews plus points for the average rating.
Points for how many reviews
Points for the average rating
How the two become 15 points
Under 10 reviews here, internet reputation fills all 15 points (its mark times 1.5). From 10 reviews on, the two marks are added and scaled down to 15 (the total times 0.75).
No reviews on our site yet
35 reviews here, averaging 4.6 stars
Do their lab reports back up the label?
A certificate of analysis (COA) is a lab report on one batch: which peptide it is, how pure it is and how much is in the vial. We download every COA a supplier publishes and read it ourselves. What the supplier writes on its product page counts for nothing on its own.
First, who ran the test
If none of a supplier's certificates came from an independent lab, it gets 0 for this whole part, and nothing below applies. That happens in four cases:
A company testing its own product and naming no outside lab proves nothing.
Manufacturer release documents aren't an independent test.
It names a real lab, but has no verification code and doesn't match how that lab issues reports.
Decided only after we check their COA pages, product pages and product photos by hand.
A supplier that gets 0 here shows the reason and the evidence on its own page.
Publishing, up to 15 points
6 for a Janoshik report we can verify, or two or more certificates from a named independent lab. 4 for one. 2 if the lab isn't clear.
The share of their peptides with a certificate. All of them earns 4; a quarter earns about 1.
Averaged over every certificate, not just the newest. Under 6 months counts in full, under a year two-thirds, under two years one-third.
The share of tested peptides with certificates from two batches at least 30 days apart. Testing once at launch is easy.
Matching the label, up to 10 points
Only certificates from an independent lab count here. We compare each result with the label and with the purity the supplier advertises.
Within 3% of the label is full credit, 3 to 10% off is half, more than 10% off is nothing. Overfilled counts as wrong too: a “10mg” vial holding 13mg makes every dose 30% too strong.
At or above the advertised purity is full credit, up to 1 point below is half, anything lower is nothing. No advertised purity means we compare with 98%.
Points are the average credit across all results. If we could read fewer than 5, the supplier gets half the points rather than a guess, because a gap in our reading isn't its fault. A bad certificate never leaves a supplier worse off than having none.
A supplier with verified Janoshik reports
The vial line: 9 vials earn full credit, 2 earn half and 1 earns nothing. That's 10 out of 12, and 10/12 of 7 points is 5.8.
Every certificate we've read, and how each compared with the label, is public on Claims vs COA.
What each supplier page counts
Each supplier page shows three facts about its certificates. They are not points: they never change a score or the order of a list.
- Products with a lab certificate. How many peptides in the supplier's product table have at least one certificate that names an independent lab. Each peptide counts once, and any tested size counts. CJC-1295 with and without DAC are two products. Blends are left out.
- Found on the lab's own website. How many of the supplier's certificates we found in the issuing lab's online lookup. Many labs have no lookup, so a low number is not a bad sign.
- Contamination tests. How many of its certificates also test for endotoxin, sterility or microbes, or heavy metals.
A certificate counts only when it is the supplier's own: not issued to another company and not copied from another supplier's website. “Not checked yet” means we have not finished checking. It is never a zero. Certificates we found in our 7-8 Oct 2026 re-scan have not been through the lab lookup yet: they count for products when they name a lab, and are not yet in the other two facts.
How results are ordered
The default sort, Best match, weighs trust over price.
Trust. The score on this page. A supplier with scam reports has a low community mark, so it drops down the list on its own.
Price. Price per milligram against every other supplier of the same peptide. Cheapest ranks highest.
Prices are re-checked weekly, so how recently one was checked doesn't change the order. If you only care about price, sort by Cheapest per mg.
The three badges
Verified means we tested it. Tracked means we watch it but haven't tested it yet. Flagged means we have evidence of a problem.
Only used with documented reports of fake products or orders that never arrived. We never flag a supplier on a hunch.
Their certificate and our test stay separate
A supplier's certificate and our own test are different kinds of evidence, so we show them side by side instead of blending them. Until we've tested a supplier, our side says so.
Waiting for our test
Once our result is in (example)
What a score can't tell you
We'd rather say what we don't know than overstate what we do.
We haven't tested this supplier ourselves. We report what anyone can check: prices, listing history, reviews and the documents the supplier publishes. No PSV result doesn't mean a bad result.
A test tells you what was in one batch on one date: which peptide and how pure. It doesn't guarantee the next batch, and it says nothing about safety or effects in the body.