Every figure here is checkable at the laboratory that produced it
60 second check

Seven Questions That Tell a Supplier from a Shopfront

Sixty seconds, and you do not need a seller picked to use them. Answer what you can. Anything you cannot answer is already telling you something, and the page then shows what a passing answer looks like on each one.

Seven questions, about a minute

  1. Is a laboratory named on the report itself?
  2. Is there a batch code before you pay?
  3. Is the purity measured, or only written?
  4. Is there a verification key you can type in?
  5. Does the report describe your vial?
  6. What do the terms say when it goes wrong?
  7. Who told you, and what do they get?

Score the seller you already have open

The forums where researchers compare suppliers ban sourcing discussion outright, so the one question everyone needs answered is the one that gets removed, and it moves to private messages where nothing can be checked. This is the public version of that conversation.

The seven checks

Janoshik / 73 peptide tests / 215 dollars

Have someone in mind? Answer for them. If you do not, answer for the last site you looked at, or just read the seven and see what a real one has to show you. Not sure counts as a no, and that is the point.

Check 01
Is there an independent laboratory named on the certificate?
Not "lab tested". A laboratory name that is not the seller's own. A vendor testing itself is grading its own homework.
Check 02
Can you see a batch number before you pay?
One certificate reused across a whole product line proves nothing about your vial. The lot number has to be on the page and on the glass.
Check 03
Is the purity figure specific, with a test date?
"Over 99 percent" is a slogan. A figure with decimals and a date came off an instrument. Nobody rounds to three decimal places.
Check 04
Has the supplier paid for the analysis, per batch?
Janoshik lists 73 peptide tests and the cheapest is 215 dollars, against a vial that starts near 105. That is a cost the seller is either carrying or skipping.
Check 05
Does it ship from inside your customs union?
Where it physically dispatches from, not where the company is registered. A parcel that crosses the EU border is an event you do not control.
Check 06
Can you pay by card, through a regulated processor?
Crypto and bank wire have one thing in common: once it is gone, it is gone. Card processing means someone ran diligence on the merchant, and you keep a dispute route.
Check 07
Is there a written policy for a parcel that never arrives?
Published terms, not a reassurance in a chat window. If the only answer is "contact us", you know how that goes when you need it most.
Outside lab Batch matched Verify code included Amount measured CoA available