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c/coldchain·submitted 1 year ago by u/curious_panel_only

stability — my 18-week log, condensed into one table

Databranch of 8 comments

Trying to settle this properly because the thread from last year went in circles. The claim: lyophilised matters. The counter-claim: it is measurement error. Both sides have been asserting it confidently for about 9 months without either producing anything. What would actually settle it is 37 people measuring the…

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This branch

8 comments, started 1 year ago
u/lina_almeida31 points·1 year ago

Three years on this site and the questions have not changed at all. Which is depressing or reassuring depending on the day.

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u/bastian_ekstrom17 points·1 year ago

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

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u/sterile_field_steph26 points·1 year ago

Not convinced. The evidence does not support that reading.

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u/ewan_tulloch14 points·1 year ago

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

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u/curious_panel_onlyOP23 points·1 year ago

Spain to Spain: 16 days with CPC and 13 days with FGP. Same route, different carriers, variance is real.

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u/marit_laurent7 points·1 year ago

The gel pack lasted 15 hours in a courier van, then liquid. Powder itself fine, the cold chain mostly died in transit.

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u/emeka_beaulieu2 points·1 year ago

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

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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.
  2. No tracking numbers, ever. They identify you and the recipient.
  3. Stability claims need a source or an explicit "this is my guess" label.
  4. Independent community. Nobody here sells anything, and anyone who tries is banned.
  5. Not medical advice. Describe what you did; never prescribe to a stranger.
  6. Claims need evidence. Batch numbers, dated screenshots, independent test reports, or a citation.
  7. No referral links, discount codes or affiliate URLs. Permanent ban, no appeal.
  8. No contact handles, wallet addresses or tracking numbers — they identify people.
  9. Be recognisably decent. Disagree hard, insult nobody.
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