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c/coldchain·posted 1 year ago by u/priya_ogunleye

[Results] 46 weeks on 5mg, full numbers, ask me anything boring

Question Clean Column ×4 Slow Clap ×3

Right, the stability question again, but with numbers this time.

I have 8 data points over 6 weeks. The pattern is consistent enough that I do not think it is chance, and boring enough that nobody is going to screenshot it, which is usually a good sign.

The thing I would flag for anyone new: the effect I am describing showed up at week 10, not week 59. People give up long before the interesting part.

Interested in whether this matches other people's logs or whether I am an outlier.

2,861 up / 485 down86% upvoted36 commentsid q31e799 Feb 2025

36 comments

30 in this archive, depth 5

best — the order this archive was captured in

u/mod_cold_roomMOD276 points·1 year ago

Removed a chain here. The rule is one line long and it is not negotiable.

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u/marta_ilunga375 points·1 year ago

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

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[deleted]118 points·1 year ago

[deleted]

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u/nadia_kjaer166 points·1 year ago

Reconstituted or dry powder?

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u/plain_titration_2024137 points·1 year ago

Small correction: the trial was 10 weeks, not 13. Does not change your point but people will quote it.

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u/brigade_detector101 points·1 year ago

Customs clearance took 13 days. Package sat unrefrigerated during that. Powder tested clean after, reconstituted solution probably would not have.

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u/asks_dumb_questions25 points·1 year ago

Customs clearance took 13 days.

Disagree on that part. 98.1% and 98.3% on the same vial is normal.

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u/coa_collectorarchivist64 points·1 year ago

Customs clearance took 13 days.

Disagree on that part. 98.7% and 98.9% on the same vial is normal.

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u/tidy_vialdrawer_watch28-24 points·1 year ago

Strongly agree. Peak temperature is not the whole story.

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u/solene_abubakar1 point·1 year ago

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

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u/priya_ogunleyeOP1 point·1 year ago·edited

Strongly agree.

Disagree on that part. 96.8% and 96.2% on the same vial is normal.

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u/elodie_kuipers71 points·1 year ago

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

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u/priya_ogunleyeOP26 points·1 year ago

Logger trace from my shipment: 4 hours at 23°C. Powder tested 98.3% against 98.4% claim. Tolerates more than the box implies.

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u/milan_mensah31 points·1 year ago

Logger trace from my shipment: 4 hours at 23°C.

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

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u/priya_ogunleyeOP12 points·1 year ago

The gel pack lasted 12 hours in a courier van, then liquid. Powder itself fine, the cold chain mostly died in transit.

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u/priya_weiss44 points·1 year ago

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

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u/emeka_beaulieu21 points·1 year ago

Yeah, data logger is the only acceptable proof.

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u/sequence_checkerresearch peptides15 points·1 year ago

This is the "correlation is mechanism" thing again. You changed three variables at once.

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u/bence_ibarra17 points·1 year ago·edited

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

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u/intent_to_treat9 points·1 year ago

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

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u/prior_auth_painappeals0 points·1 year ago

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

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u/zeynep_ndiaye25 points·1 year ago

Peak temperature and how long at that temperature?

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u/tidy_vialdrawer_watch2817 points·1 year ago

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

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u/sten_palacios17 points·1 year ago

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

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u/milos_vestergaard24 points·1 year ago

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

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u/appeal_letter_al14 points·1 year ago

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

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u/cato_batista10 points·1 year ago

Strongly agree. Peak temperature is not the whole story.

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u/ilias_steiner6 points·1 year ago

Strongly agree.

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

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u/soren_yildiz21 points·1 year ago

Not convinced. The evidence does not support that reading.

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u/jarno_karlsen11 points·1 year ago

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

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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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  3. Stability claims need a source or an explicit "this is my guess" label.
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