We show our work

This category asks researchers to take a lot on faith. Vendor sites publish their own certificates. Directories charge for the reviews. Threads disagree with each other and nobody shows their working.

Peptul was built because the useful version of this is boring and nobody was doing it: collect what can actually be verified, publish it openly, and be honest about the gaps. It is run by two people, not a company with a lab.

The Peptul Score records what we could independently verify about a vendor across five checks - independent testing, review integrity, business transparency, operator independence and pricing transparency. Where a check could not be completed it is left out rather than scored zero, and below three completed checks there is no score at all.

A verified COA on Peptul means we opened the document and traced it to a named lab. It is not the vendor telling us they test. Where a vendor only claims third-party testing, the site says exactly that instead.

We do not run assays and we do not test product. A score measures how much a vendor can be checked, not how good the compound in the vial is.

We do not sell, ship, handle or source any compound. There is no shop here and there never will be.

We do not give medical, clinical or dosing advice. Reference ranges and cycle lengths in the library are educational summaries of published literature and community practice, not instructions, and every research compound on this site is research-use-only.

We do not tell anyone which vendor to trust. We publish the evidence and the gaps in it. The judgement is yours to make.

Some vendors pay Peptul a commission when somebody buys through a link here. Vendors marked Partner pay Peptul a commission and are listed first in this order. Paying does not change a vendor’s trust tier, COA badge, Peptul Score or reviews - those come from evidence and are worked out the same way for every vendor.

Those links are marked, on the card and on the vendor page, so the disclosure sits where the placement is rather than in a policy page nobody opens. Nothing about a vendor's record is for sale, and no vendor has ever been given the ability to edit it.

Every review is readable without an account and without paying. That is the whole difference between this and the alternatives, so it is not going to change.

Vendors that closed, were raided or turned out to be a problem stay in the directory as a record rather than being quietly deleted. Where our own data contradicts a vendor, we publish the contradiction.

If something here is wrong, tell us and we will correct it. That includes vendors: the evidence is what moves a record, and it moves in both directions.