Is hearing loss linked to dementia? New research says yes

Emerging studies suggest hearing loss could contribute significantly to dementia. Early action—from hearing tests to hearing aids—may help preserve cognitive function as you age. (Image: Pexels)

The inability to hear clearly—or complete hearing loss—is often brushed off as just a sign of ageing. Many people don't consider it to be a major health issue. However, recent studies are warning that hearing loss may greatly increase your risk of developing dementia.

Multiple studies now point to a strong connection between hearing impairment and a greater likelihood of developing cognitive decline and memory-related disorders compared to those with normal hearing.

According to the Times of India, dementia was more common in almost 61% of older Americans with moderate to severe hearing loss.

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Further, The Lancet Commission on Dementia has flagged untreated hearing loss as the single largest modifiable risk factor for dementia.

Why Brain Health Depends on Hearing Health?

Researchers claim that people are unaware of the stronger link between the brain and the ears. As hearing deteriorates, the brain needs to make more effort to interpret sound, taking resources away from other cognitive processes like memory and thought. This overload may eventually deteriorate the health of the brain.

Mental overload: When hearing is impaired, the brain must work harder to decode sounds, which reduces memory and cognitive function. Over time, cognitive exhaustion may result from this ongoing mental effort.

Brain shrinkage: The "use it or lose it" theory states that the parts of the brain that process sound may weaken or shrink if regular auditory input is stopped.

Social isolation: People with hearing loss often retreat from conversations and social activities. Loneliness and less mental stimulation create a perfect storm for dementia risk.

Biological effects: There’s some research showing other brain changes, like increased levels of proteins linked to Alzheimer's in people with age-related hearing loss.

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Can Hearing Aids Lower the Risk?

Although we still don’t have definitive proof that hearing aids prevent dementia, there’s growing evidence they slow cognitive decline, especially in people already at risk due to other health issues.

Recent research backed by the National Institutes of Health (NIH) and conducted by Johns Hopkins University found that hearing aid users with hearing loss had a 32% lower prevalence of dementia than non-users.

Even if hearing aids don’t directly stop dementia, they can enhance communication, increase social interaction, and keep the brain engaged—all key pillars of healthy ageing.

Simple Ways to Protect Your Hearing—and Your Brain: 

• Get your hearing tested regularly after age 60
• Use hearing aids if your doctor recommends them
• Avoid prolonged exposure to loud noises
• Stay mentally sharp and socially connected
• Manage lifestyle conditions like high blood pressure or diabetes Hearing loss isn't just a mild inconvenience of getting older—it could be a powerful, preventable risk factor for dementia. Acting early with regular screenings and treatment doesn’t just preserve your hearing—it helps protect your cognitive health, emotional well-being, and overall quality of life as you age.