Untreated hearing loss increases the risk of cognitive decline and dementia, Dr. Dylan Wint said [1].
This connection suggests that managing auditory health is a critical component of long-term brain health. Because hearing loss can accelerate the onset of cognitive impairment, early intervention may reduce the global burden of dementia.
According to data from the World Health Organization, addressing untreated hearing loss can prevent up to seven percent [2] of global dementia cases. The relationship between the ear and the brain is biological; hearing loss leads to reductions in brain volume and changes in neural networks [1, 3].
A study published in 2026 found that hearing loss was associated with a 71% [3] higher risk for dementia. The research indicated that these risks are particularly acute for individuals who carry the APOEε4 gene, which is a known genetic risk factor for Alzheimer's disease [1, 3].
Dr. Wint said that the brain undergoes structural changes when it no longer receives adequate auditory stimulation. These changes can trigger a cascade of cognitive decline that manifests as memory loss, or disorientation.
Public health guidelines in the U.S. and globally now emphasize the importance of hearing screenings as a preventative measure [2, 4]. Medical professionals said that using hearing aids or other assistive devices can mitigate the cognitive strain caused by auditory deprivation. By restoring sound input, patients may slow the progression of brain-volume reduction [1, 3].
The evidence suggests that hearing loss is not merely a sensory issue but a neurological risk factor. Addressing this gap in care could significantly alter the trajectory of cognitive health for millions of aging adults [2, 5].
“Addressing untreated hearing loss can prevent up to seven percent of global dementia cases.”
The correlation between auditory impairment and dementia shifts hearing health from a quality-of-life issue to a primary preventative health priority. By identifying hearing loss as a modifiable risk factor, healthcare systems can potentially lower the incidence of dementia through scalable interventions like hearing aid accessibility, particularly for genetically predisposed populations.
