The Link Between Hearing Loss and Dementia

For years, hearing loss was treated as a natural, mostly harmless part of getting older. But over the past decade, a landmark body of research has changed that thinking. It turns out that treating hearing loss may be one of the most modifiable risk factors for cognitive decline we have.

What the Research Shows

The landmark 2020 report from the Lancet Commission on Dementia Prevention identified hearing loss as one of the top modifiable risk factors for dementia. The National Institute on Aging and Johns Hopkins University have published extensive findings linking untreated hearing loss to accelerated cognitive decline.

Why the Connection Exists

Researchers point to several possible mechanisms. Untreated hearing loss means your brain works harder just to decode sound, leaving less cognitive reserve for memory and thinking. Hearing loss is also strongly associated with social isolation and depression — both of which are themselves risk factors for cognitive decline. When you can't easily follow conversations, you're more likely to withdraw from the very social engagement that keeps your brain sharp.

There's also evidence that reduced auditory stimulation may contribute to brain atrophy in areas responsible for processing sound and speech.

What You Can Do

The most important takeaway is that hearing loss is addressable. The first step is a comprehensive hearing evaluation to establish your baseline. From there, treating any hearing loss you have — whether through hearing aids, communication strategies, or other interventions — keeps your brain engaged and socially connected.