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c/labresults·posted 2 years ago by u/plateau_patrol

why does nobody talk about Medutest

Below Spec Clean Column ×4

why does nobody talk about Medutest. If this has been answered properly somewhere, link me and I will delete.

Date of analysis anchors the result to a manufacturing period. A two-year-old result is evidence about two years ago and should be read that way.

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

Area percent and net peptide content are different measurements and most reports give one. Quote which, or the comparison downstream is meaningless.

Research-use-only material is not approved for human use and nothing here should be read as a recommendation to use it.

5,702 up / 5,082 down53% upvoted19 commentsid 1qqk8p22 Oct 2023

19 comments

19 in this archive, depth 5

best — the order this archive was captured in

u/nadia_trevino83 points·2 years ago

Inter-lab variance on this assay runs roughly a point either way, driven mostly by gradient and integration. Two results inside that band agree; they do not disagree quietly.

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u/plateau_patrolOP40 points·2 years ago

Area percent or net peptide content?

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u/honest_syringe45 points·2 years ago

Yes — date of analysis, because a result from two years ago describes a different manufacturing month.

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u/ahmed_fonseca14 points·2 years ago

Right, and a point or two between services is ordinary. It is agreement, and every month somebody posts it as a scandal.

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u/kenji_demir18 points·2 years ago

Correction: that is the claimed figure, and the measured one is the higher of the two in your own screenshot.

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u/endotoxin_elliemicro14 points·2 years ago·edited

results without method are gossip with decimals

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u/coring_the_stopper11 points·2 years ago

split a vial across two services once and you will never argue about ground truth again

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u/ffmi_watcher37 points·2 years ago

Chain of custody is why member-funded testing is worth more than a supplied certificate: the vial tested is the vial that arrived at a member’s door.

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u/saskia_mwangi-7 points·2 years ago

Do you have the trace, or only the summary?

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u/scam_taxonomyc/scamalerts1 point·2 years ago

How to build a series that means something, if you are going to spend money on testing anyway.

Three tests on one lot tells you about your measurement. Three tests on three lots, spread over a year, tells you about a process. The second is the one worth paying for and it costs the same.

Buy small, keep the batch numbers, send one vial per lot, and post each one with the claim next to it. After four or five you have something no individual review can give you: a band, a direction and a date range. That is what the source pages are made of.

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u/kavya_radich14 points·2 years ago

Agreed on quoting the claim alongside the result. Half the arguments here are two people comparing to different reference numbers.

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u/tuva_kirchner5 points·2 years ago

vendor, compound, batch, service, result — that is the template

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u/coa_janitorMOD9 points·2 years ago

Retitled — the original stated a discrepancy the numbers do not show.

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u/stubborn_batchlist_only9 points·2 years ago

Sent a vial in specifically to check a supplier’s claim after a good experience. It matched. Boring result, worth logging.

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u/mod_ambulatoryadmin7 points·2 years ago

the trend across lots is worth more than any single figure

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u/joaquin_trevino9 points·2 years ago

inter-lab variance runs a point or two, plan your outrage accordingly

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u/nadia_trevino2 points·2 years ago

post the claim next to the result or the number floats

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u/honest_syringe6 points·2 years ago

The template is vendor, compound, batch, service, claim, result, and who paid. Every one of those fields exists because a result missing it has been argued about here before.

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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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