New Study Shows 61% Reduction in Dementia Risk with Hearing Aids

A groundbreaking study published in JAMA Neurology (August 18, 2025) has revealed an exciting link between hearing health and brain health. Researchers found that people with hearing loss who begin using hearing aids before the age of 70 have a 61% lower risk of developing dementia over the next two decades compared to those who leave their hearing loss untreated.

This research underscores something we in audiology have long observed: treating hearing loss is not just about better communication, it can have a profound impact on long-term health and quality of life.

About the Study

• Source: Published in JAMA Neurology, using decades of data from the renowned Framingham Heart Study.
• Participants: Nearly 3,000 adults aged 60 and older without dementia at the start of the study.
• Duration: Followed for up to 20 years.

Key Findings

• Under 70, Hearing Aids Protect the Brain
  Participants diagnosed with hearing loss before age 70 who used hearing aids had a 61% lower risk of dementia compared to those with untreated hearing loss.
• No Hearing Loss Still Protective
  Those under 70 with no hearing loss had a 29% lower risk of dementia compared to participants with untreated hearing loss
• After 70, No Clear Effect
  Interestingly, the protective effect was not seen in people who first addressed their hearing loss after age 70—suggesting that early intervention is crucial.

Why Early Intervention Matters

The study’s authors suggest several reasons why treating hearing loss early may protect the brain:

• Reduced Cognitive Strain
  Untreated hearing loss makes the brain work harder to process sound, leaving fewer resources for memory, focus, and other thinking skills.
• Sustained Brain Stimulation
  Hearing aids keep the brain engaged with sound, which may help prevent long-term structural changes associated with cognitive decline.
• Social Connection
  Hearing loss often leads to withdrawal from social activities, a known risk factor for dementia. Hearing aids can help people stay active and connected.

What This Means for You

This study is a powerful reminder that hearing health is brain health. If you or someone you love has noticed changes in hearing, seeking help before age 70 could make a meaningful difference not only for communication but also for long-term cognitive wellbeing.

Don’t wait. If you’re experiencing hearing difficulties, book a hearing assessment today. Early treatment may do more than improve your hearing—it could help protect your brain.

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