Aging Is Not a Disease: Prof. Suresh Rattan on What Actually Matters
Most of the longevity industry rests on a premise Suresh Rattan rejects outright: that aging is a disease to be cured. After more than forty years studying the biology of aging, one of the field's founding biogerontologists argues the opposite — that aging is a natural consequence of being alive, and that the useful question is not how to stop it but how to understand it and age well.
Listen on SpotifyAging is a process, not a disease
Rattan's central claim is that treating aging as a pathology to be cured misframes the whole problem. Aging is the gradual, largely inevitable accumulation of molecular damage that comes with being a living system — not a discrete illness with a single cause or a single cure. That distinction matters, because it moves the goal away from chasing a reversal biology does not offer and toward protecting function for as long as possible.
There are no genes programmed to make us age
Rattan coined the term gerontogenes, but the idea is often misread. There is no genetic program whose purpose is to make us old. What we inherit are genes for maintenance and repair, and aging is what happens as those systems slowly lose ground. Evolution optimised us to survive and reproduce, not to last forever, which is why maintenance eventually falls behind.
Why the anti-aging industry sells false promises
A new supplement, biomarker or protocol arrives every week, each promising to slow, reverse or cure aging. Rattan argues most of this is a business built on a category error. He is openly skeptical of the narratives around figures like Bryan Johnson and David Sinclair, and of longevity escape velocity — the claim that technology will soon let us outrun death. Selling certainty where the science offers none is, in his view, the core problem.
How humans already doubled their lifespan
The largest gains in human life expectancy did not come from supplements or biohacks. They came from clean water, sanitation, vaccines, antibiotics and falling childhood mortality. That history is a useful corrective: the boring, systemic interventions did the heavy lifting, and there is little reason to expect the next leap to arrive in a pill.
Hormesis: the one idea worth taking seriously
If there is a lever Rattan endorses, it is hormesis — the principle that mild, repeated stress makes a biological system more resilient. Exercise is the clearest example: the stress of training triggers repair and adaptation that leave the body stronger. This, not exotic compounds, is where the real return on health lives. Dose matters, though — past a point, stress stops being hormetic and becomes damage.
What it actually means to be healthy
Rattan defines health not as the absence of disease but as the ability to function and adapt — to do what you want to do and to recover from the stresses of life. That reframing puts the emphasis on capacity and independence rather than any single number, and it is why living well matters more to him than simply living longer.
Can we reach 150 — and how should healthcare change?
Asked whether humans can realistically reach 150, Rattan is unconvinced; the biology does not support open-ended extension. The more important shift, he argues, is in healthcare itself — away from waiting to treat disease and toward actively promoting health and function across the whole lifespan. That is a change in incentives and mindset, not a technology we are waiting on.
Key takeaways
Aging is a natural process, not a disease to be cured. There are no genes programmed to make us age — only maintenance and repair systems that gradually fall behind. Much of the anti-aging industry sells false certainty. History's biggest longevity gains came from public health, not biohacks. Hormesis — mild stress such as exercise — is the most credible lever. Health is the capacity to function and adapt, and aging well beats merely aging slowly.