What if healthy aging isn’t simply about adding years to your life?
What if it also means adding years without dementia?
Researchers analyzed data from 12,409 people in the long-running Atherosclerosis Risk in Communities study.
The participants were dementia-free at age 55 and were followed for roughly 26 years.
Researchers focused on three vascular risk factors:
- Smoking
- High blood pressure
- Diabetes
People who had none of those three risk factors at midlife were estimated to have about 30 years of dementia-free survival from age 55.
Those with all three had about 17.5 years.
That’s a difference of roughly 13 years.
That’s a remarkable number.
But it needs some context.
This doesn’t mean three healthy habits buy you 13 years.
The study was observational.
It doesn’t prove that eliminating one particular risk factor will give an individual a specific number of extra dementia-free years.
People with healthier vascular profiles may differ from other participants in many other ways.
The study also looked at only three risk factors rather than every influence on dementia.
Still, the underlying message is important.
Your brain doesn’t exist in isolation from the rest of your body.
Blood vessels supply the brain.
And what’s good for vascular health can also be relevant to brain health.
The researchers found that participants with greater midlife vascular risk not only developed dementia sooner on average, but were also more likely to die before developing dementia.
The Watchdog takeaway
You don’t need a futuristic brain supplement to start protecting your future brain.
Three very unglamorous things matter:
Don’t smoke. Keep blood pressure under control. Prevent or manage diabetes.
They’re not particularly exciting.
But sometimes boring is good.
Evidence & Source
Evidence: Moderate to strong. Large, long-running U.S. cohort with decades of follow-up, but observational research cannot establish cause and effect.
Source: Neurology Open Access, 2026 — Read the study(opens in a new tab).