Yes — and it’s stronger than many people realize. Growing research shows that hearing loss in midlife and beyond is one of the most significant modifiable risk factors for dementia.
According to the 2020 Lancet Commission on Dementia, untreated hearing loss may account for up to 8% of dementia cases worldwide — more than any other single modifiable factor identified in the report.¹ That’s a big deal.
But why does hearing affect brain function? First, struggling to hear forces the brain to work harder to decode sounds, which can reduce resources available for memory and thinking.² Second, hearing loss often leads to social isolation, which is another well-known risk factor for cognitive decline. And finally, hearing impairment may directly affect the structure and function of brain regions tied to language and memory.³
The good news? Addressing hearing loss — especially with hearing aids or other assistive technologies — may help preserve cognitive function. Some studies suggest that people who use hearing aids perform better on memory tests and may reduce their dementia risk compared to those who don’t.⁴
If you’re over 50 and noticing changes in your hearing, don’t wait. A simple hearing test could benefit more than just your ears — it could help protect your brain.
Sources:
- Livingston, G., et al. (2020). Dementia prevention, intervention, and care: 2020 report of the Lancet Commission. The Lancet.
- Lin, F. R., et al. (2013). Hearing loss and cognitive decline in older adults. JAMA Internal Medicine.
- Peelle, J. E., & Wingfield, A. (2016). The neural consequences of age-related hearing loss. Trends in Neurosciences.
- Maharani, A., et al. (2018). Use of hearing aids and dementia incidence in a large older adult cohort. Journal of the American Geriatrics Society.
Keeping Sharp 
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