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c/coldchain·posted 2 years ago by u/low_appetite_lisa

my eGFR moved and I cannot work out whether lyophilised is why

Data Well Actually ×9 Sourced ×2 Long Haul ×1

Genuinely asking, not being difficult.

Everyone in c/glp1aus repeats that lyophilised is important. I believe it, but I have never seen anyone show why, and when I search I get 2 threads of people agreeing with each other.

Is there a paper? Is there a measurement? Or is this one of those things that is true because it has been repeated since 2023?

I am not trying to be the "source?" guy. I would just like a source.

6,277 up / 347 down95% upvoted51 commentsid vo95ru7 Nov 2023

51 comments

30 in this archive, depth 4

best — the order this archive was captured in

u/analog_alphabet-22 points·2 years ago

Half-life is about 168 hours, so steady state lands around week 12–5. Practical consequence: what you feel in week 1 is not what that dose does.

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u/kian_solberg868 points·2 years ago

Water content matters more than people think. If a vial is carrying residual moisture, your "10mg" is not 10mg of peptide.

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[removed]315 points·2 years ago

[removed by moderator]

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u/low_appetite_lisaOP126 points·2 years ago

The gel pack lasted 10 hours in a courier van, then liquid. Powder itself fine, the cold chain mostly died in transit.

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u/split_dose_sceptic143 points·2 years ago

lane reports need origin, destination, carrier, and actual transit days

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u/low_appetite_lisaOP111 points·2 years ago·edited

Disagree. What you are describing is consistent with packaging, not with what you concluded.

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u/coldchain_karencold chain48 points·2 years ago

lane reports need origin, destination, carrier, and actual transit days

Disagree on that part. 99.2% and 96.2% on the same vial is normal.

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u/spain_receta281 points·2 years ago·edited

Disagree. What you are describing is consistent with ice pack, not with what you concluded.

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u/low_appetite_lisaOP526 points·2 years ago

France to France takes 24 days on average, variance is 16 days

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u/ines_lindqvist584 points·2 years ago
well that is my evening gone, thanks for the paper
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u/adaeze_weiss351 points·2 years ago

time-at-temperature integral is the dose, not just peak temperature

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u/asks_dumb_questions260 points·2 years ago

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

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u/nayeli_iyer0 points·2 years ago

time-at-temperature integral is the dose, not just peak temperature

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

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u/usb_logger_ursulaMOD231 points·2 years 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/fatima_yildiz272 points·2 years ago

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

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u/intent_to_treat0 points·2 years ago

excursion claims need a logger trace or a photo at unboxing, not "it felt warm"

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u/bruno_dumitru366 points·2 years ago·edited

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

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u/prior_auth_painappeals142 points·2 years ago

Slight fix: the number was 98.4, not 98.3. Decimal point, but a fairly consequential one.

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u/soren_yildiz216 points·2 years ago

Do you have the logger trace?

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u/sequence_checkerresearch peptides151 points·2 years ago

That is net peptide content, not purity. Different number, different meaning.

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u/soren_yildiz47 points·2 years ago·edited

Edit to your parent would help — the concentration you quoted assumes one scenario and you have written another above it.

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u/milan_mensah68 points·2 years ago

lyophilised powder is far more forgiving than reconstituted solution

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u/iman_castellanos157 points·2 years ago·edited

Strongly agree. Peak temperature is not the whole story.

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u/maren_sorensen48 points·2 years ago

Do you have the logger trace?

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u/kian_solberg18 points·2 years ago

Strongly agree. Peak temperature is not the whole story.

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u/nayeli_iyer11 points·2 years ago

gel packs last 22 hours, after that you are relying on the box itself

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u/certified_referenceQC74 points·2 years ago

excursion claims need a logger trace or a photo at unboxing, not "it felt warm"

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u/ewan_tulloch59 points·2 years ago·edited

excursion claims need a logger trace or a photo at unboxing, not "it felt warm"

Adding to this: excursion is doing more work than the comment implies.

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u/careful_gradient_again114 points·2 years ago

Customs clearance took 19 days. Package sat unrefrigerated during that. Powder tested clean after, reconstituted solution probably would not have.

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u/bastian_ekstrom89 points·2 years ago·edited

Denmark to Denmark takes 24 days on average, variance is 40 days

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About c/coldchain

Temperature and stability in the real world: what an excursion actually costs you, why lyophilised powder is far more forgiving than reconstituted solution, how to read a logger CSV, and how to photograph a failed shipment so the conversation with the vendor is short.

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c/coldchain rules
  1. Excursion claims need a logger trace or a photo taken at unboxing. "It felt warm" is not data.
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