Synthetic Torpor: Metabolic Suspension for Life Extension

Torpor Induction

Target core temperature 37.0°C

Cooling / rewarming rate 1.5°C/hr

Time acceleration 40×

Normothermic — awake

Physiology

Core temperature

37.0°C

Metabolic rate

100%

Elapsed (real) time

0.0 d

Biological age spent

0.0 d

Life-extension factor

1.00×

Cellular cooling stress0%

Hypoperfusion / organ risk0%

How it works

Synthetic torpor is a real research direction (NASA/DARPA-funded, and mouse "Q-neuron" torpor induction, Takahashi et al. 2020) for reversible hypometabolism: cooling core temperature a few degrees to slow the biochemistry of aging without the ice formation of full cryopreservation.

Metabolic rate follows the classic Q10 rate law used for every biochemical reaction:

R(T) = Q10^((T − 37°C)/10),   Q10 ≈ 2.5

The rate-of-living theory of aging treats oxidative/biological damage as proportional to metabolic throughput, so "biological time" accumulates slower than clock time while cold:

d(bio age)/dt = R(T) · dt
Life-extension factor = (elapsed clock time) / (biological age spent)

Two real physiological limits fight the benefit:

Cooling stress — cell membranes and osmotic balance tolerate only a few °C/hour of change; exceeding a safe rate accumulates cryobiological stress even with no freezing.
Hypoperfusion risk — sustained deep cooling (below ~25°C core) reduces peripheral blood flow; the longer tissue stays that cold, the higher the risk of localized organ damage.

The controls trade these off: a deep, fast, long torpor bout buys the largest life-extension factor but drives both risk meters up — exactly the engineering problem synthetic-torpor research is trying to solve for long-duration spaceflight and, longer term, healthspan extension.

Torpor pod occupant Metabolic / ROS activity

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