Buying peptides: what to check first
This page sells nothing and recommends no seller. It is the list to go through before every order, whoever it is with. Seven questions. A seller who can't answer them has already given you their answer.
One
Does the batch reference on the certificate match what you'll receive?
A certificate of analysis covers exactly one batch. If the batch reference on the certificate and the one on the vial are not the same string, the document describes something else — however good the numbers look. It is the single most common gap. Ask before ordering whether you get the certificate for the batch that ships, not “a” certificate.
Two
Which analyses were run?
“Tested” is not one thing. Purity (usually HPLC), identity (usually mass spectrometry) and endotoxin are three separate analyses. Most single-page certificates show the first and stay silent on the rest. Purity alone does not confirm the molecule is the one named.
Three
Is the laboratory named — and can you check it?
An unnamed laboratory is an unverifiable claim. A named one can be looked up, accreditation included. How to do that is in Verify the testing lab yourself.
Four
Who commissioned the certificate?
Whoever pays the laboratory picks the sample. A certificate commissioned by the seller is a different kind of evidence from one buyers commissioned together. Either can be fine — but you should know which you are reading.
Five
Does the seller stay within “research use only”?
A seller who promises you results for your body has stepped outside the legal frame — and one who is loose about that is probably loose about the batch too. The “research use only” label is not an excuse; it is the condition under which the material may be supplied at all. More under Peptides: what they are.
Six
Is there a full imprint and a contact that answers?
Name, address, registration number, an address you can write to and a person who replies. A seller who leaves that out does not want to be found — which matters precisely at the moment something goes wrong.
Seven
Can you order together with others — with testing against that exact batch?
Alone, you get the certificate afterwards and are asked to accept it. In a group, the batch is fixed in advance, the analysis is commissioned against it, and everyone receives the certificate for the material they actually received. That is a structural difference, not a price argument. How a group works is under Skip the reseller. Get the batch.
What this list is not
- ×A recommendation It names no seller and no product. It says what to ask.
- ×Legal advice What applies in a given case depends on the substance and the use. This page cannot answer that.
- ×A claim about effects Research material. Not for use in humans or animals. No exceptions.
Where peppies helps
The first four questions are exactly what our certificate verification answers: every certificate sorted by origin and matched to the batch it belongs to. The seventh is the group order. Alongside: blood testing with a Tasso device, booked clinicians, and one record for all of it. The company site is peppies.eu.
Questions one to four, answered for you
Create a free account to see certificates sorted by origin and matched to their batch — and open groups for question seven.