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c/labresults·posted 27 days ago by u/boots_or_bust

[Janoshik] GL Biochem raw material vs a reseller vial of the same compound

Janoshik

GL Biochem raw material vs a reseller vial of the same compound. One vial, one service, one member paying, which is the only kind of result this board should treat as evidence.

First result I ever posted here got asked for the batch number and the claim. Fair, and my posts have been better ever since.

Split one vial between PeptideMeter and VendorInvestigate. The two numbers were within half a point of each other and I stopped worrying about which lab to trust.

QST BPC, batch matched the paperwork, PeptideMeter came back 97.7% against a claimed 97.0%. Paid for it myself, posting it because the log is only worth anything if people do.

Screenshot none of this. Read the whole thread, including the parts where I am told I am wrong.

166 up / 48 down78% upvoted8 commentsid msz40s2 Jul 2026
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8 comments

8 in this archive, depth 4

best — the order this archive was captured in

u/meera_sandvik0 points·26 days ago

A series across separate lots estimates a process. Repeat tests on one lot estimate the measurement. Both are useful and they answer different questions.

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u/refund_ledger23 points·27 days ago

Did the vial lot match the paperwork lot?

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u/ismael_nwosu5 points·27 days ago·edited

Which service, and did you pay for it yourself?

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u/hugo_pires7 points·26 days ago

Kept every report as a PDF with the batch in the filename. Two years in, it is the most useful folder I own.

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u/aksel_jansen8 points·27 days ago

Careful with the trend claim. Four results over two years is a very sparse series to draw a line through.

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u/ahmed_fonseca10 points·27 days ago

Careful with the trend claim.

This is why the template has a batch field. Without it the result is about a vial nobody can identify.

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u/boots_or_bustOP5 points·26 days ago

Batch number and date of analysis?

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u/marisol_moreau-20 points·26 days ago

How many separate lots does your series cover?

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A running record of independent test results people paid for themselves. Every post follows the same shape: vendor, product, batch, testing service, method, and the number. Good results and bad results are equally welcome and get equal scrutiny.

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