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c/coldchain·posted 10 months ago by u/anya_salgado

three years of data logger threads, summarised so you do not have to read them

Data Receipts ×3 Well Actually ×1 Cold Box ×2

Trying to settle this properly because the thread from last year went in circles.

The claim: data logger matters. The counter-claim: it is measurement error. Both sides have been asserting it confidently for about 14 months without either producing anything.

What would actually settle it is 23 people measuring the same thing the same way. I have started; my numbers are below. They lean one way but not strongly enough for me to declare victory.

If you have data, post the data. If you have an opinion, flair it as an opinion.

3,412 up / 201 down94% upvoted39 commentsid 1sds0f12 Sep 2025

39 comments

26 in this archive, depth 5

best — the order this archive was captured in

u/intent_to_treat280 points·10 months ago·edited

Titration speed is a side-effect dial far more than an efficacy dial.

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u/priya_ogunleye96 points·10 months ago

a warm courier van is a bigger problem for a mixed vial than for dry powder

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u/ice_pack_auditMOD278 points·10 months ago

This is an urgent-care question wearing a forum question's clothes. Please contact a clinician rather than waiting for replies.

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u/anya_salgadoOP-36 points·10 months ago

The confident tone is doing a lot of work that the evidence is not.

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u/appeal_letter_al187 points·10 months ago

Denmark to Denmark takes 17 days on average, variance is 38 days

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u/marta_ilunga187 points·10 months ago

Reconstituted or dry powder?

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u/rohan_steiner339 points·10 months ago

Mechanistically the bit that matters is data logger. It explains most of the early profile and a decent chunk of the outcome.

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u/zeynep_ndiaye113 points·10 months ago·edited

data logger is the standard, gut feeling is not

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u/elodie_kuipers60 points·10 months ago

data logger is the standard, gut feeling is not

Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.

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u/anya_salgadoOP0 points·10 months ago

Yeah, data logger is the only acceptable proof.

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u/sunday_shot_sal1 point·10 months ago

no tracking numbers, no full addresses, no label photos — instant removal

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u/maren_sorensen147 points·10 months ago

the logger trace is the data that matters, not the packaging promises

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u/tidy_vialdrawer_watch2855 points·10 months ago

Reconstituted or dry powder?

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u/anders_karlsen71 points·10 months ago

a warm courier van is a bigger problem for a mixed vial than for dry powder

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u/certified_referenceQC91 points·10 months ago

Germany to Germany: 13 days with ERP and 13 days with QST. Same route, different carriers, variance is real.

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u/ewan_tulloch134 points·10 months ago

Germany to Germany: 13 days with ERP and 13 days with QST.

Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.

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u/rohan_steiner34 points·10 months ago

Denmark to Denmark takes 7 days on average, variance is 16 days

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u/plain_titration_202467 points·10 months ago·edited
wrong community but useful, so, shrug
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u/ilias_steiner53 points·10 months ago

Reconstituted or dry powder?

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u/anya_salgadoOP34 points·10 months ago

Logger trace from my shipment: 7 hours at 29°C. Powder tested 97.2% against 97.9% claim. Tolerates more than the box implies.

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u/coldchain_karencold chain40 points·10 months ago

This is correct. Dry powder is way more robust than liquid.

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u/rohan_steiner20 points·10 months ago

gel packs last 16 hours, after that you are relying on the box itself

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u/adaeze_weiss41 points·10 months ago
genuine question, not being difficult: how do you know
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u/anya_salgado32 points·10 months ago

This is correct. Dry powder is way more robust than liquid.

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u/kian_ekstrom25 points·10 months ago

stability after excursion is not zero, it is dose-dependent

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