It might sound alarming when you first hear it: untreated hearing loss is now considered one of the leading modifiable risk factors for dementia.
But understanding what that actually means — and what you can do about it — is more empowering than frightening.
The Connection the Research Has Found
Researchers at Johns Hopkins have been studying the relationship between hearing loss and cognitive decline for more than a decade. What they found is significant: people with moderate untreated hearing loss have roughly three times the risk of developing dementia compared to people with normal hearing. Those with severe untreated hearing loss face an even higher risk.
This does not mean that hearing loss causes dementia. The relationship is more complicated than that. But it does mean the two are meaningfully connected, and scientists have several theories as to why.
Why Hearing and Brain Health Are Linked
One leading explanation is cognitive load. When your hearing is impaired, your brain works much harder to fill in the gaps during every conversation. Resources that would normally go toward memory, attention, and processing get redirected toward the effort of just hearing. Over time, that constant strain may contribute to cognitive fatigue and decline.
Another theory involves social isolation. People with untreated hearing loss often withdraw from conversations and social situations because they are too difficult to follow. Social isolation is independently associated with a higher risk of cognitive decline.
A third possibility involves what researchers call auditory deprivation — the brain receiving fewer meaningful sound signals over time, which may contribute to structural changes in areas involved in memory and language.
What This Means for You or Your Parent
The important word in the research is “modifiable.” Unlike age or genetics, hearing health is something you can act on. Studies suggest that treating hearing loss — most commonly with hearing aids — may reduce or delay the associated cognitive risks.
A 2023 study published in The Lancet found that hearing aids significantly reduced cognitive decline in older adults at higher risk. The finding added momentum to the growing scientific consensus that hearing care is brain care.
What to Do
If you or someone you love is over 60 and has not had a hearing evaluation in the past year, that appointment is worth prioritizing. A baseline evaluation gives you something to track over time, and if hearing loss is present, earlier treatment opens up more options.
Revolution Hearing serves patients across Indiana, Ohio, Virginia, and New York. Schedule a hearing evaluation at a location near you and take one concrete step toward protecting your long-term health.
