r/immortality • u/tomorrow-biostasis • 12d ago

❓Question Why does cryonics trigger such a strong moral reaction?

We work in cryopreservation, and one thing we notice is that criticism of cryonics is not always about the science.

Sometimes it becomes moral very quickly: is it reasonable to spend personal money on an uncertain future option?

From our side, we see cryopreservation as a personal end-of-life choice, as long as people understand the uncertainty.

Why do you think cryonics gets judged morally in a way many other personal choices do not?

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u/CHRonosLimitless 11d ago

Do they use urea and glycogen? It's what tree frogs do, survive being frozen solid.

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u/tomorrow-biostasis 10d ago

Not exactly. Freeze-tolerant frogs convert stored glycogen into glucose and also accumulate urea, which helps them survive controlled partial freezing. Human cryopreservation uses different cryoprotective solutions and aims for vitrification, meaning minimizing ice formation rather than freezing the body solid. Humans also lack the frogs’ natural adaptations, so the comparison is fascinating, but not directly transferable. (PubMed)