Mounting evidence supports a link between hearing loss and dementia

We often consider hearing loss to be an unavoidable part of getting older — just another sign of ageing. But what if addressing hearing loss could actually help protect our brains as we grow older?

A groundbreaking Danish study — one of the largest of its kind — has found a compelling link between hearing aid use and a reduced risk of dementia. The research followed more than 573,000 individuals aged 50 and above over a 14-year period, and the findings may change the way we think about hearing health and cognitive decline.

The Unexpected Connection Between Hearing and Brain Health

The study found that while hearing loss alone was associated with a 7% increased risk of developing dementia, that risk rose sharply to 20% for individuals with hearing loss who did not use hearing aids. In contrast, those who did use hearing aids saw only a 6% increased risk — even lower than the average.

In other words, untreated hearing loss appears to significantly increase the likelihood of cognitive decline, whereas using hearing aids might help reduce that risk.

Why Hearing Loss Deserves More Attention

Hearing loss isn’t just an issue of communication; it may also contribute to social isolation, reduced mental stimulation, and increased cognitive strain — all known risk factors for dementia. When the brain must work harder to interpret sounds, it may have fewer resources available for memory and thinking.

By restoring some of this auditory input through the use of hearing aids, we could be helping the brain to remain sharper for longer.

Early Action Makes a Difference

Dr Leah Mursaleen, Head of clinical research at Alzheimer’s Research UK (ARUK) said dementia and hearing loss are "not an inevitable part of ageing and early intervention is crucial”.

Alzheimer’s Research UK has urged the Government to include a hearing check in the NHS Health Check for people over 40.

“This could help millions identify hearing issues sooner, and potentially reduce the risk of dementia,” she added.

University College London (UCL) and UCL Hospitals (UCLH) have already begun exploring the benefits of personalised hearing support for older adults with mild cognitive impairment. Their pilot trials have shown that such interventions can significantly increase regular hearing aid use — and may ultimately protect brain function.

What This Means for You or a Loved One

If you or someone close to you is experiencing signs of hearing loss, there’s no time like the present to take action. A routine hearing test could be the first step not just towards clearer hearing, but towards a healthier mind in later life.

As research continues to deepen our understanding of the connection between sensory and cognitive health, one message is becoming increasingly clear: hearing aids are not just about sound — they could also play a vital role in the fight against dementia.