Brain-Only Preservation: The New Longevity Technology Trend That Even Alarms Supporters

In 1967, the first human body was cryogenically frozen (James Bedford). The idea was simple: preserve the body until future technology could revive it. About 600 people have done so since. But in 2026, a new trend is gaining momentum: instead of the whole body, only the brain. Companies like Nectome, attracting attention and prominent clients like Sam Altman, are pouring efforts into techniques completely different from classical cryonics and offer a disturbing and simultaneously intriguing question: If the information that is you—memories, personality, consciousness—is stored in the brain, why preserve the body too?

The Problem with Classical Freezing

Traditional cryonics freezes the body in liquid nitrogen at about -196 degrees Celsius. The problem: during the process, ice crystals form that destroy cells. Without the complete cellular structure, even in the distant future, it will be impossible to revive the person.

Classical companies (Alcor, Cryonics Institute in Michigan) use vitrification, turning the body into "glass" instead of ice. This is better but still not perfect. Tissues like the heart and lungs are not preserved optimally.

What is preserved particularly well: the brain. Neurons respond well to preservation techniques, and their branching (synapses) survive.

The Nectome Concept

The biotechnology company Nectome, located in the San Francisco Bay Area in California, has developed a technique called Aldehyde-Stabilized Cryopreservation (ASC). In short:

1. While the person is still alive, a special solution of glutaraldehyde is injected into the bloodstream
2. The chemical disperses throughout the brain and fixes all synapses in place
3. Then it is frozen in liquid nitrogen
4. The brain is preserved in a scannable state for decades

Nectome's claim: This preserves the connectivity of your 86 billion neurons with about 100 trillion synapses. In the future, scanners could read this structure and reconstruct "you" as a computerized model.

The Ethical Problem: It Requires Your Death

This is the critical point. The ASC process kills the patient. The procedure was described by the company's founders as "100 percent lethal." Glutaraldehyde fixes cells but also renders them non-functional. No revival. No preservation in a living state. Only freezing of structure.

Nectome targets terminally ill cancer patients in the US, relying on California's End of Life Option Act, which permits physician-assisted suicide for terminally ill patients. According to the plan, the patient would undergo the procedure while still alive, under anesthesia, with the assistance of family and a medical directive.

Sam Altman, CEO of OpenAI, is among the company's supporters and clients: it was reported that he placed a refundable deposit of about $10,000 to join Nectome's waiting list, assuming his brain would be preserved and uploaded in the future. The sharp public criticism came from a different direction: neuroscientists and ethicists argued that the technology is not currently feasible and that it exploits terminally ill patients with uncertain hope. Following the uproar, MIT severed ties with the company in 2018.

The Debate: Is It Really You?

Even if the technology works, there is a deep philosophical question: If "you" are reconstructed as a computerized model, is it really you?

Consciousness researchers are divided:

• Continuum theory: If the structure is identical, the personality is identical. Yes, it is you.
• Flow theory: Consciousness is a continuous process, not a structure. When the brain stops, "you" end. The reconstruction is the creation of a new person.
• Wired identity approach: If there are two copies of you after reconstruction, neither is the original "you."

There is no clear answer. This is a question that will remain with humanity even after the technology works.

Competing Entities

Nectome is not alone:

• Brain Preservation Foundation (non-profit): Awarded prizes to researchers demonstrating preservation methods. The Nectome team, led by Robert McIntyre, won these prizes.
• Cryonics Institute (Michigan): Offers whole-body preservation using vitrification
• Tomorrow Bio (Berlin, Germany): Advanced perfusion methods
• Oregon Brain Preservation (now Sparks Brain Preservation, Oregon): Offers aldehyde-based brain preservation (chemical fixation before cooling), costing on the order of about $28,000

The Clinical Reality: Not Yet Proven

It is important to be clear: There is not a single example of a person or animal that has undergone such a process and been brought back to life. All the technology is speculative. We do not know if:

• The preservation truly retains all the necessary information
• Future scanners will be able to read at the required resolution
• The simulation will be a "person" at all, rather than just a computer program
• A company holding hundreds of brains will be available in 2150 to perform the reconstruction

Some experts believe the technology is not fundamentally impossible. But the chance it will work is unknown, and many in the scientific community are highly skeptical.

Alternative: For Those Who Don't Want to Freeze

If the technology is not for you, there are alternatives:

• Organ transplantation: Growing organs from personal stem cells (dECM). Less ambitious, more realistic
• Anti-aging drugs: Currently in development
• Healthy lifestyle: Extends life by 7-12 years on average, completely free
• Digital backup of memories: Not "you" but preserving legacy. This includes journals, video, online documents.

Who Is It For?

The companies primarily offer this to:

• Terminally ill patients: Who have little to lose
• Theoretical believers: Whose philosophy supports that the information in the brain is the essence of identity
• The wealthy: The service costs about $100,000 to $250,000. Not for everyone

The Bottom Line

Brain preservation is not a longevity cure. It is a bet on the future. If the technology develops, some of the preserved will receive some form of renewed life. If not, they have contributed to research. A personal decision with profound philosophical implications. In the meantime, being alive and healthy today is the surest way to be alive tomorrow.