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

[Results] 66 weeks on 10mg, full numbers, ask me anything boring

Discussion Clean Column ×3 Slow Clap ×2 Long Haul ×1

Right, the cold chain question again, but with numbers this time.

I have 15 data points over 30 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 8, not week 57. People give up long before the interesting part.

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

6,448 up / 2,483 down72% upvoted34 commentsid pt4y0925 Dec 2024

34 comments

30 in this archive, depth 5

best — the order this archive was captured in

u/anya_rautio524 points·1 year ago

data logger is the standard, gut feeling is not

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u/asks_dumb_questions184 points·1 year ago

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

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u/amara_dziedzic44 points·1 year ago

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

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u/hugo_bergstrom22 points·1 year ago

France to France takes 22 days on average, variance is 30 days

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u/coldchain_karencold chain14 points·1 year ago

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

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u/coa_collectorarchivist171 points·1 year ago

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

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[deleted]77 points·1 year ago

[deleted]

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u/coa_collectorarchivist19 points·1 year ago

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

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u/fatima_yildizOP58 points·1 year ago

gel packs last 20 hours, after that you are relying on the box itself

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u/kofi_ferreira-7 points·1 year ago

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

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u/fatima_yildizOP0 points·1 year ago

France to France: 8 days with FGP and 35 days with TFC. Same route, different carriers, variance is real.

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u/sterile_field_steph0 points·1 year ago

gel packs last 7 hours, after that you are relying on the box itself

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u/sunday_shot_sal1 point·1 year ago

customs clearance often breaks the cold chain, factor that in

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u/usb_logger_ursula405 points·1 year ago

lyophilised powder is far more forgiving than reconstituted solution

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u/coldchain_karencold chain337 points·1 year ago

lyophilised powder is far more forgiving than reconstituted solution

Disagree on that part. 99.2% and 99.3% on the same vial is normal.

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u/creatine_and_cardio83 points·1 year ago

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

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u/nayeli_iyer66 points·1 year ago·edited

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

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u/nikhil_asante260 points·1 year ago

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

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u/coldchain_karenMOD104 points·1 year ago

Tracking number removed. It identifies both ends of a shipment.

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u/andres_restrepo63 points·1 year ago

France to France takes 8 days on average, variance is 28 days

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u/nayeli_iyer19 points·1 year ago·edited

Strongly agree. Peak temperature is not the whole story.

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u/creatine_and_cardio13 points·1 year ago

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

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u/hugo_bergstrom201 points·1 year ago

I love that this community will spend 40 comments on a detail. That pedantry is why the numbers here matter.

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u/brigade_detector291 points·1 year ago

Yeah, data logger is the only acceptable proof.

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u/coa_collectorarchivist196 points·1 year ago

The practical rule people converge on is 28 days at fridge temperature after first puncture, and that comes from the preservative, not the peptide.

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u/soren_yildiz102 points·1 year ago

the Netherlands to the Netherlands: 8 days with BCH and 25 days with QSC. Same route, different carriers, variance is real.

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u/anya_salgado42 points·1 year ago

Not convinced. The evidence does not support that reading.

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u/solene_abubakar66 points·1 year ago

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

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u/milan_mensah90 points·1 year ago

Customs clearance took 10 days. Package sat unrefrigerated during that. Powder tested clean after, reconstituted solution probably would not have.

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u/milos_vestergaard50 points·1 year ago

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

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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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