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Quick answer
Five, and a seller worth buying from publishes them: the certificate of analysis, the name of the laboratory that tested it, that laboratory’s accreditation wording, the list of tests it ran, and the seller’s company details with written terms. Together they show what was tested, by whom, and who answers if something does not match.
3 min readUpdated 15 September 2026Research and educational reading only
What each one settles, where it stops, and how to check it yourself.
| Document | What it tells you | What it does not tell you | How to check it |
|---|---|---|---|
| Certificate of analysis | A laboratory’s results for one production lot | Anything about a different lot | Scan its QR code, or enter its key, on the laboratory’s own website |
| The laboratory’s name | Who ran the tests | Whether that laboratory is accredited | Find the name on the certificate itself, not only on a store page |
| Accreditation wording | How the laboratory describes its quality system | Anything beyond the exact words used | Read it word for word: accredited to a standard and aligned to one are different claims |
| The list of tests | Which checks were run on that lot | Results for tests that are not listed | Look for identity and purity, then note what else was tested |
| Company details and written terms | Who you are paying, and what it promises if a result disagrees | Anything about whether a product is approved | Look the company up where it says it is registered, and keep a copy of the terms |
A certificate record is short. Each line answers one question, and together they let you check a lot yourself.
As published by Peptara Labs, which describes Titreon Analytical as aligned to ISO/IEC 17025:2017, not itself accredited. This site has not tested this lot. Source: peptaralabs.io/coa
Three questions about the documents behind a Peptara Labs order. Each answer links its source. This site has not tested any product.
Yes, one per product on its certificates page, each from a recent batch with its lot code, HPLC purity and test date. Its website also lists the printed batch certificate for what shipped among what arrives.
Sources: peptaralabs.io/coa, the Peptara Labs website, read 15 September 2026
By its description: identity by HPLC and LC-MS, HPLC purity against a 95.0 percent release criterion, net peptide content, sterility, bacterial endotoxin, heavy metals and a fentanyl screen.
Source: peptaralabs.io/coa
Yes. Each Titreon certificate has a QR code and a printed key that open it on titreonanalytical.com, and each Janoshik endotoxin report opens on verify.janoshik.com. This guide checked both on 15 September 2026.
Sources: peptaralabs.io/coa, titreonanalytical.com, verify.janoshik.com
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