Damage accumulation rates, not removal capacity, predict lifespan across species, with short-lived organisms following ballistic aging patterns while mammals operate in a quasi-steady-state regime. This distinction reveals that longevity is determined primarily by how quickly cellular damage accumulates rather than how efficiently it is cleared.
Key Points
- Damage production rate predicts lifespan better than repair capacity
- Two distinct aging regimes: ballistic in short-lived species, quasi-steady-state in mammals
- Mammalian aging operates within measurable equilibrium between damage and removal
Longevity Analysis
The research reframes aging as a problem of damage velocity rather than removal efficiency. Mammals maintain lifespan through active equilibration between injury and clearance—a system that requires continuous metabolic engagement. This has direct implications for interventions targeting regeneration and detoxification pathways; the goal is not simply to enhance cleanup mechanisms, but to reduce the rate at which damage is generated in the first place. Understanding which regime governs a given organism or tissue allows for more precise targeting of interventions that address the actual rate-limiting factor.
Original published by Nature Aging, by Naveh Raz.