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The truth about cryonics success rates: hope, hype, and hard science

When people first hear about cryopreservation, one question often follows: What are the chances it will actually work? In this article, we explore the reality of the cryonics success rate, separating scientific facts from common misconceptions. Learn what success means in cryonics, what’s possible today, and why so many still choose to preserve.
4 minutes
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7 May 2025
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Cryonics
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Cryopreservation
Alessia Casali

What does “success” mean in cryonics?

Unlike traditional medical treatments, cryonics isn’t about short-term survival. It’s about long-term preservation and the possibility of future revival. So when we talk about “success,” we have to be clear:

  • Cryonics does not currently have any cases of full human revival.
  • However, it does preserve body and brain structure in ways that science suggests could one day enable revival.
  • “Success” in this context means high-quality preservation with minimal damage to biological structures — especially the brain.

In other words, cryonics success today is about keeping the door open.

So, what is the current success rate?

If we define success as revival after cryopreservation, then the success rate today is 0% — because no human has yet been revived.

But if we define success as the ability to preserve neural structures accurately, the picture is different.

  • Animal models have shown successful vitrification and rewarming of organs
  • Cryoprotectants have been developed that prevent ice damage in delicate tissues
  • Brain preservation studies suggest that connectomes (neural wiring diagrams) can remain structurally intact after cryopreservation

This gives cryonics scientific credibility — not as a cure, but as a preservation method awaiting future solutions.

Why the success rate isn’t the full story

Critics often dismiss cryonics by pointing to the lack of successful revival. But this overlooks what cryonics actually aims to do:

  • Prevent irreversible damage
  • Preserve identity-encoding structures
  • Buy time for future medical breakthroughs

No cryonics provider claims that revival is possible today. What they offer is a chance, where otherwise there would be none.

What would increase the cryonics success rate?

For cryonics to succeed in the fullest sense, several fields need to advance:

  • Nanomedicine: to repair damage caused by disease and preservation
  • Whole-organ rewarming: to safely bring tissues back to biological function
  • Brain mapping and repair: to restore consciousness and memory
  • Biological or synthetic body regeneration: for reintegration

These are major challenges — but not impossible ones. Advances are already happening in areas like organ printing, connectomics, and cellular reprogramming.

Can we trust current preservation quality?

At Tomorrow.bio, the quality of preservation is central to our mission. Our procedures focus on:

  • Rapid response after legal death
  • High-quality cryoprotectant perfusion
  • Controlled, gradual vitrification
  • Storage in secure, passive liquid nitrogen systems

What about animal data?

Cryonics research is still limited, but promising:

  • Some organs (like kidneys and brains) have been vitrified and rewarmed with minimal damage
  • Preservation of rabbit and pig brains has shown excellent structural integrity
  • Cryobanked tissues and embryos have already been used in reproductive and regenerative medicine

While revival remains out of reach, the ability to store complex biological structures safely is well established.

Why do people choose cryonics anyway?

Even with a cryonics success rate of “unknown,” many people see it as the most rational response to terminal illness.

They say:

  • “The alternative is certain death.”
  • “I’d rather have a chance than no chance.”
  • “It’s an extension of my values around science, curiosity, and life.”

For these individuals, cryopreservation is not about odds, but about possibility.

What about pets?

Cryonics success rate discussions often focus on humans, but pet preservation is held to the same scientific and ethical standards. Tomorrow.bio offers full-body pet cryopreservation, allowing you to preserve a beloved animal companion alongside yourself.

Use our pet preservation calculator to learn more about the process and cost.

Is it all hype?

There is certainly misinformation and exaggeration about cryonics in popular media. Some portray it as instant freezing, or as a rich person’s fantasy.

But the scientific approach taken by Tomorrow.bio and similar organizations is grounded in:

  • Evidence-based methods
  • Transparency about limitations
  • Honest discussion about uncertainty

We’re not selling a promise — we’re offering a possibility.

About Tomorrow.bio

At Tomorrow.bio, we are dedicated to advancing the science of cryopreservation with the goal of giving people and pets a second chance at life. As Europe’s leading cryopreservation provider, we focus on rapid, high-quality standby, stabilization, and storage of terminal patients — preserving them until future medical technologies may allow revival and treatment.

Our mission is to make cryopreservation a reliable and accessible option for everyone. We believe that no life — human or animal — should end because current medical capabilities fall short.

📧 Contact us at: hello@tomorrow.bio
🌐 Visit our website: www.tomorrow.bio
🤝 Schedule a consultation: Book a call