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Single comment threadYou are looking at one branch of [Meta] the vendor rule is doing its job and people should stop complaining — 31 comments in the full submission. View in context.
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c/vendorvetting·submitted 2 months ago by u/cormac_pereira

[Meta] the vendor rule is doing its job and people should stop complaining

Vendorbranch of 6 comments

the vendor rule is doing its job and people should stop complaining. Nothing about this affects the ranking maths, before anyone asks. 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…

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6 comments, started 2 months ago
u/usp_appendixcompendial85 points·2 months ago

Inter-lab variance on this assay runs a point or two either way. Two services disagreeing by that much is agreement, not a discrepancy, and treating it otherwise starts pointless arguments.

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u/lina_falk38 points·2 months ago·edited

Agreed on buying small first. The cost of a test is small next to the cost of committing to a supplier you have not checked.

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u/cormac_pereiraOP34 points·2 months ago

three independent results beat thirty forum posts

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u/mod_cold_roommod · c/coldchain21 points·2 months ago

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

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u/zeynep_villalobos25 points·2 months ago

This. Ask for the batch record. The ones who send it inside a day have told you more than any review could.

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u/ignacio_silva5 points·2 months ago

Sent the same compound from Homopeptide and GL Biochem to Medutest in the same month. Both came back above the claim on the certificate — mine was 98.6% on a stated 98.0%.

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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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