| Role | In short |
|---|---|
| Manufacturer | Produces the peptide, fills it into batches, and commissions the lab. Almost always based in China and rarely shows up in your chat themselves. Their evidence applies to their production, not to your vial. |
| Middleman | Your direct contact. They sell the manufacturer's goods essentially ex-works: they message you, they ship, they are your point of contact. They don't have their own brand. You have to trust them - and the manufacturer behind them. |
| Shop | Own website, own name, own label on the vial. Buys in bulk from the manufacturer or a middleman - who stands behind them is usually not visible. Often has their own analyses done. You pay conveniently, and you pay a multiple. |
| Lab | Measures a submitted sample and issues the certificate of analysis, often called a COA. It tests the sample, not the supply chain behind it. |
Why the role says more than the name
Anyone can assume a name. A role has to be filled.
Whoever actually produces a peptide has a facility, batches, and a lab they commission. Whoever only passes it on has a chat and an account. Both can send you the same photo of the same vial, and both can pass on the same lab certificate. The difference only becomes visible when you ask what the document refers to - and depending on the role, the answer to that question is completely different.
That's why I assign everything I collect not just to names, but to roles. Together, these four roles form the supply chain - the path from the manufacturer to your mailbox.
Who actually produces the peptide?
The manufacturer. They run the synthesis, fill into batches - a batch is the quantity produced in one production run and carries a common number - and usually commission the lab that tests the sample. Almost everything traded in Europe and the US comes from China.
A manufacturer rarely shows up in your chat themselves. They sell through people who speak for them and pass on their goods.
What you can check with a manufacturer: how long they have been known under this name, which labs have tested for them, whether there are batches with conspicuous results.
Who sends you the goods?
The middleman. In the vast majority of cases, this is your counterpart: a messenger contact, a semi-open provider, a contact person from a group. They sell the goods of a manufacturer essentially ex-works - they message you, they take your money, they ship.
You depend on them. They are your point of contact, and if something goes wrong, they are the only one you can reach. So you have to trust two parties: them and the manufacturer behind them. That's exactly why I build the chain - so you can see who stands behind your contact.
A middleman produces nothing and usually tests nothing. The documents they show you almost always come from the manufacturer. That's not a criticism, it's their role. It only changes what their evidence can prove.
Some act as if they were the manufacturer themselves. They say "our production", "our lab" - and mean a company they have a commission arrangement with. This can often be recognized by a single question: Who owns the company on the document they show - and is that the same name they message you under?
What is a shop - and why is it different?
The shop is not a variant of the middleman, but its own thing. They buy in large quantities - either from a middleman or directly from the manufacturer - and then resell under their own name: own website, own label on the vial.
Who actually produced the peptide is usually not stated anywhere. That's exactly the difference: With a middleman, you at least know the manufacturer behind them in principle. With a shop, they have disappeared behind a label.
What you get from a shop is primarily convenience: the goods are already in your region, you pay with methods you know, and you have a website instead of a chat in front of you. For that, you pay a multiple of what the same goods cost at their origin. The markup buys service - it buys no different goods and no better evidence.
Many shops have their own analyses done instead of passing on the manufacturer's certificate. This has two sides. For you, it's a bit better: what was tested then is the goods the shop actually has in stock, not a sample from the factory - so the evidence moves closer to what gets sent to you. Whether your particular vial comes from the tested batch, you know with a shop just as little as with the manufacturer. The second reason for their own document is not a safety reason anyway: The manufacturer's brand is on their certificate - and that brand shouldn't appear on the shop's own label.
For the data situation, the shop is the most difficult case. Because they appear under their own name, they are hard to distinguish from a manufacturer in many sources - both simply appear as "provider". That's why I explicitly list shops separately and don't lump them together with middlemen.
Who tests the goods?
The lab. They receive a submitted sample, measure it, and issue a report - the certificate of analysis, often called a COA. A COA is the document in which a lab records what it measured in exactly that one sample.
Crucially: The lab tests the sample, not the supply chain behind it. They don't know which batch the sample came from, who submitted it, and what will later be shipped to you. They answer exactly one question: What was in this one sample.
A lab is also itself a role that can be checked. An existing lab can be independently found: own web presence, reachable address, other customers. There are certificates from labs that don't exist - someone made up a letterhead. If no existing lab can be found for a lab name, that in itself is a finding.
For exactly this kind of check, I have built a separate sister project: On peptidetesting.cc I collect lab profiles - real labs with their limitations, gray cases, and names behind which no existing lab can be found. There you can also find what to look out for when reading a certificate of analysis.
Why does the role change the value of a lab report?
The same lab report proves something different depending on the role of the person showing it. This is the point where everything comes together. The same report, the same numbers on it - and yet three different statements:
- From the manufacturer: They sent a vial from one of their batches to a lab. That says something about their production, but nothing about your vial.
- From the middleman: They pass on the manufacturer's document from whom they source. That says something about that manufacturer - and nothing about what arrives at your door.
- From the shop: Often their own document for their own stock - thus closer to what gets sent to you than a certificate from the factory. Whose goods it originally was is usually not stated there, and whether your vial comes from the tested batch is equally unclear.
And behind it all stands the role of the lab: If someone doubts the lab, all reports from that lab lose their evidentiary value simultaneously - without a single report being false. The document remains what it is. Only what it proves changes.
That's exactly why I don't collect certificates, but certificates with their origin.
What if the role is unknown?
Then that is stated openly - as "role unconfirmed", without evaluation. For the vast majority of providers I have recorded, that's exactly the case.
That's not an omission I hide. A role is only considered confirmed with me when evidence supports it and a person has decided it. Everything else is called unconfirmed - and unconfirmed is a permissible permanent state, not a placeholder for "coming soon".
What you should take from this: If a provider says "role unconfirmed", I don't know. No more and no less. I don't guess.
Can a role change?
Yes - and that is one of the most useful findings of all.
"We thought they were a manufacturer, now we know they are a shop" is not a correction of a typo, but a finding with a date. That's why I don't overwrite roles, but continue them. The old status remains readable, with the day it was valid.
That's also the reason why someone who changes their role cannot simply reinvent themselves cleanly: The history sticks to the identity, not to the current appearance.
What this means for you
Before you believe anything someone shows you, one question helps:
In what role is this person speaking right now - and does the document they show even originate from that role?
I sell nothing and recommend no one. I show which role is documented, since when, and what that is based on - no judgment, only what is available. What you make of it is up to you.