31/01/2026
Your doctor checks your cholesterol every year. But never asks about the #1 modifiable dementia risk factor.
Hearing loss.
It accounts for 8% of all dementia cases. More than diabetes. More than smoking.
New study published 6 days ago: Hearing aids reduce dementia risk by 61% in people under 70.
61%.
No drug comes close to that effect size.
Yet less than 20% of people who need hearing aids use them.
Here's why hearing loss could be a cause of dementia:
1. Your brain works overtime decoding unclear sounds
↳ Diverts resources from memory and thinking
↳ Leads to cognitive exhaustion
↳ Accelerates mental decline
2. Social isolation doubles dementia risk
↳ Can't hear conversations, so you avoid them
↳ Stop going to restaurants, parties, gatherings
↳ Loneliness damages the brain
3. Auditory cortex shrinks when not used
↳ "Use it or lose it" applies to hearing
↳ Brain regions atrophy without stimulation
↳ Cognitive reserve decreases
The research is clear:
ACHIEVE trial (2023): Hearing aids slowed cognitive decline by 48% over 3 years in adults 70-84.
Framingham Heart Study (2026): People under 70 with hearing aids had 61% lower dementia risk over 20 years.
Earlier intervention = bigger benefit.
Signs you might have hearing loss:
Asking people to repeat themselves
Trouble following conversations in noisy places
Turning TV volume up
Missing parts of conversations
Family members saying "You're not listening"
Avoiding social situations
If you're over 50 and notice any of these: Get tested.
Reference:
rezahg.com