What your hearing has to do with your brain
Hear Community · Hearing Health & Technology
For years, researchers noticed a troubling pattern: older adults with hearing loss tended to experience faster memory and thinking decline than those who heard well. The open question was whether treating hearing loss could actually change that path — or whether it was just a bystander.
In 2023, the largest study of its kind gave the clearest answer yet. The ACHIEVE study, led by Dr. Frank Lin at Johns Hopkins and published in The Lancet, followed nearly 1,000 adults aged 70–84 with untreated hearing loss for three years. Half received hearing aids and support from an audiologist; half did not.
Among participants at higher risk of cognitive decline, three years of hearing treatment slowed that decline by 48% — nearly in half.
Why would hearing affect thinking? Researchers point to a few reasons. When sound comes in muffled, your brain has to work harder to fill in the gaps, leaving fewer resources for memory and understanding. Over time, straining to hear also nudges people to pull back from conversations, dinners and gatherings — and that social withdrawal is itself linked to cognitive decline.
What this means for you
The encouraging part: hearing is one of the few dementia risk factors you can actually do something about. The Lancet Commission on dementia lists untreated hearing loss as the single largest modifiable risk factor in midlife. Addressing it early won’t guarantee anything — but the evidence increasingly suggests it’s one of the kindest things you can do for your long-term brain health.
Source: Lin et al., “Hearing intervention versus health education control to reduce cognitive decline (ACHIEVE),” The Lancet, 2023; Alzheimer’s Association International Conference, 2023.
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