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c/vendorvetting·posted 1 year ago by u/camila_sandvik

unpopular opinion: most of what gets said here about Janoshik is guesswork

Question Receipts ×4

Thinking out loud about this: unpopular opinion: most of what gets said here about Janoshik is guesswork.

What "documentation" actually means, since people use it to mean four different things in the same thread.

A certificate of analysis is one document about one lot. A batch record is the manufacturing trail behind that lot. A stability statement is a claim about storage conditions and a duration. A method line is how the number on the certificate was produced.

You can ask for all four. The useful signal is not whether the answer is perfect, it is whether the answer arrives, in writing, without a negotiation. ERP sends the method line unprompted; once you have seen that you stop accepting a bare number from anybody.

A certificate with a purity figure and no method line is not falsifiable. You cannot reproduce it, you cannot check it, and it tells you nothing about how the number was produced.

Independent testing is worth more than a supplied certificate for one structural reason: the chain of custody. A member who buys, ships and pays is testing the same thing you would receive.

Would rather be corrected in public than confident in private.

507 up / 12 down98% upvoted21 commentsid 24fg1e17 Jun 2025

21 comments

19 in this archive, depth 6

best — the order this archive was captured in

u/chidi_roos37 points·1 year ago

Lead time and minimum quantity are the two facts people forget to ask for and then argue about later. Both are answerable in one email before you commit.

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u/camila_sandvikOP27 points·1 year ago

Minimum order and lead time — did they quote both up front?

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u/janoshik_junkieindependent tester21 points·1 year ago

what does the certificate actually carry — that is the whole question

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u/alcohol_aversion10 points·1 year ago

Which lane, and what was the quoted lead time at checkout?

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[removed]13 points·1 year ago

[removed by moderator]

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u/pavel_kravchenko40 points·1 year ago

Did you ask for the batch-specific certificate, or the generic one?

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u/valeria_cardoso25 points·1 year ago

a claim with no batch number is a marketing document

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u/camila_sandvikOP16 points·1 year ago

Which service did the testing, and did you pay for it yourself?

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u/janoshik_junkieindependent tester12 points·1 year ago

registration number, then everything else

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u/lina_dziedzic4 points·1 year ago

the lot on the vial has to match the lot on the certificate, every time

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u/laila_almeida18 points·1 year ago

Yes. Spread across lots is the number that tells you about the process. A single high result tells you about a vial.

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u/camila_sandvikOP13 points·1 year ago

a directory entry is a record, not a recommendation

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u/signe_villalobos4 points·1 year ago

lead time quoted at checkout is the number to hold them to

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u/tl_dr_tina-26 points·1 year ago

Why the directory has two tiers, since the question comes up whenever somebody new finds it.

Twenty suppliers have enough independent results, over enough separate lots, over enough time, that the log says something. Those get a page, a test table and a link to their own storefront so you can compare their claims with the record.

The rest — nearly two hundred names — get a row, a band and a report count. Not because they are bad, but because two results is an anecdote about a vial. Manufacturing a score out of that would make the whole directory worthless, and the contrast is the point.

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u/lina_almeida1 point·1 year ago

Correction: that supplier is in the documented twenty with a source page, not in the wider-market table. Different evidence bases entirely.

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u/marta_vanhecke1 point·1 year ago

Fixing my own comment above: I said 5 orders and it is 10. The pattern is the same, the count was wrong.

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u/milos_vestergaard17 points·1 year ago

Not convinced by the ranking-by-vibe approach here. The community number is derived from reports; your feeling is derived from four posts you remember.

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u/joaquin_petrov10 points·1 year ago·edited

Not convinced by the ranking-by-vibe approach here.

milos_vestergaard is describing the batch record test and it is the fastest signal available before you spend anything.

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u/lina_ndiaye4 points·1 year ago

Agree. The verification log is the part with the checkable facts in it; the number at the top is just a summary of a lot of averaging.

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About c/vendorvetting

The community due-diligence desk. Vendor experiences, independent third-party test results, shipping and reship records, and the boring paperwork that separates a supplier from a story. Every substantive claim is expected to carry a receipt: an order id, a dated screenshot, or a test report from Janoshik, Medutest, PeptideMeter or VendorInvestigate.

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