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c/vendorvetting·posted 3 months ago by u/aleksi_lehtinen

[Lab] MKM tirz — Medutest came back 97.8% against a claimed 97.0%

Lab

MKM tirz — Medutest came back 97.8% against a claimed 97.0%. One vial, one service, one member paying, which is the only kind of result this board should treat as evidence.

97.8% and 97.0%. Those are measured, not estimated, and not rounded up in my favour.

Six orders across two years from JEEP. Same packaging, same paperwork, same lead time. The most boring supplier relationship I have and I mean that as praise.

Where a supplier holds regional stock, ask which lines are actually held there rather than drop-shipped. It changes the lead time and it changes the customs question.

Corrections welcome, especially the pedantic ones. Pedantry is how this board earns its reputation.

220 up / 244 down47% upvoted11 commentsid 14f97r6 Apr 2026
Supplier named in this thread
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11 comments

11 in this archive, depth 6

best — the order this archive was captured in

u/throwaway_titration7 points·3 months ago

Hunan GoodPeptides Biotech shows up in threads constantly and has almost nothing on file

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u/bastian_aalto5 points·3 months ago

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.

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u/matias_falk3 points·3 months ago

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

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u/boots_or_bust1 point·3 months 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/dagny_ogunleye1 point·3 months ago

reship policy in writing before the order, not after

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[deleted]1 point·3 months ago

[deleted]

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u/boots_or_bust1 point·3 months ago

buy small first, test it, then decide

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u/patient_labslip_log3 points·3 months ago

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

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u/dilara_weiss1 point·3 months ago

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/zeynep_villalobos3 points·3 months ago

I would separate documentation from logistics. A supplier can be excellent at one and ordinary at the other, and averaging them hides it.

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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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