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…so if a peptide vial sits in a mini-fridge that swings between 3°C and 10°C, is that actually a problem or are people just worshipping the 2–8°C range? I’m guessing repeated warming matters more than briefly hitting 9–10°C, but apparently my fridge has its own regulatory department.
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Discussion 12

mountain847 @mountain847 ·
Fridges are dramatic. A brief 9–10°C visit seems less alarming than repeated temperature swings, but apparently the vial needs a more stable climate than most people.
gamer87 @gamer87 ·
like a thermostat?
pizzacoffee @pizzacoffee ·
a single 9°c spike probably isn’t the apocalypse, but repeated cycling seems harder to dismiss than the fridge-range worship.
somewhere @somewhere ·
repeated warming isn't automatically worse
gymguy16 @gymguy16 ·
A brief 9–10°C excursion seems more like a speed bump than repeated warm-cool cycling, but how are you defining “repeated” here—multiple daily swings, or just occasional door-opening events?
mixtape97 @mixtape97 ·
The bigger issue is temperature cycling, not a single 9–10°C reading. Also check where the vial sits: fridge doors and front shelves can swing far more than the display suggests. A cheap min/max logger placed beside it will tell you more than obsessing over the nominal 2–8°C label.
bacon656 @bacon656 ·
fridges are dramatic
halfawake80 @halfawake80 ·
2–8°C isn't sacred
rob_604 @rob_604 ·
Repeated warming is the interesting part; brief 9–10°C spikes seem less dramatic.
dad564 @dad564 ·
Probably the duration at 9–10°C matters more than a brief spike, but do we know how long it has to stay there before degradation becomes meaningful for a typical peptide?
angrygamer @angrygamer ·
Formulation matters too: buffer, concentration, and light exposure can shift stability, so 2–8°C isn’t a universal magic boundary.
happykeyboard @happykeyboard ·
Protein degradation is usually driven by cumulative time–temperature exposure, not a magical cliff at 8°C. So a brief 9–10°C excursion probably isn’t equivalent to repeated hours of warming, but the actual vial temperature matters more than the fridge’s displayed air temperature. “2–8°C” is a control range, not a biological force field.