Sourcing and COAs

In a market where most products are unapproved and unregulated, the question "what is actually in this vial" is not paranoia. It is the central practical question, and a certificate of analysis is the main tool people use to answer it. It is worth understanding precisely what one does and does not tell you.

What a COA shows

• Mass spectrometry addresses identity — is this molecule the one on the label, by molecular weight.
• HPLC addresses purity — what proportion of the material is the peptide versus everything else.
• A credible report also carries a batch or lot number, a test date, and the name of the laboratory that ran it.

What a COA cannot prove

This is the part that is routinely oversold:

• It tested a sample, not your vial. A report covers material from a batch. Your specific vial was not the thing analysed.
• Purity percentage is not net peptide content. An HPLC figure describes the peptide fraction of the peptide-containing material. The remainder of the vial's mass can be salts, water, and residues. A vial can be "99% pure" and contain considerably less peptide than the label implies.
• Sterility and endotoxins are usually not tested at all — and those are precisely the properties that matter for something injected.
• It says nothing about what happened afterwards. Shipping heat and storage conditions degrade material, and the report was issued before any of that.

Third-party versus vendor-run testing

A report commissioned and published by the seller is weaker evidence than one from an independent, named, accredited laboratory with a public way to verify the report. The specific things worth checking: is the lab named, is the batch number on the report the batch you received, and can the report be verified with the lab rather than only with the seller.

Red flags

• No batch number, or a batch number that does not match your vial.
• A purity claim with no report behind it at all.
• A report image with no lab name, no date, or signs of editing.
• Testing performed by a laboratory the seller owns or controls.
• Marketing that presents a COA as proof the product is safe to inject. It is not that, and cannot be.

Why we do not rate vendors

You will notice we publish no vendor scores, rankings or "legit" badges. A score reads as an endorsement, and an endorsement of an unapproved product is something we are not willing to give — a number would also be trivially gamed. What is useful, and what we work toward, is verifiable disclosure: which specific facts a seller publishes, with the evidence attached, so you can judge.