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c/vendorvetting·submitted 1 year ago by u/sig_figs_sam

PeptideMeter — 8 things I got wrong before I got it right

Resolvedbranch of 10 comments

PeptideMeter — 8 things I got wrong before I got it right. Not a hot take, just something I have not seen said plainly here. 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. Why the…

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10 comments, started 1 year ago
u/batch_number_bertievetting23 points·1 year ago

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.

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u/coa_janitormod · c/coa12 points·1 year ago

Disagree that reviews are worthless. They are worthless when they say "fast shipping A+++". A dated one naming a compound and a document is evidence.

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u/teodor_lokken8 points·1 year ago

What did they say when you asked for the method line?

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u/sig_figs_samOPmod · analytical6 points·1 year ago

That is a report count, not a test count. The table lists both and they are very different numbers.

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u/usp_appendixcompendial5 points·1 year ago

registration number, then everything else

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u/sig_figs_samOPmod · analytical0 points·1 year ago

Fixing my own comment above: I said 23 orders and it is 33. The pattern is the same, the count was wrong.

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u/sofia_ferreira19 points·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/sena_ferreira16 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/sig_figs_samOPmod · analytical10 points·1 year ago

Small fix — the figure you quoted is the claimed purity from the certificate, and the independent result was the higher of the two.

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u/lina_almeida6 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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