Using hearing aids could do more than just improve communication—it may also help protect the brain. A new study published in JAMA Neurology has found that adults with hearing loss who use hearing aids have a significantly lower risk of developing dementia.

The research, led by Dr. Lily Francis from the University of Texas Health Science Center at San Antonio, followed nearly 3,000 participants from the famous Framingham Heart Study for up to 20 years. All participants were over 60 and did not have dementia when the study began. Their hearing was tested using pure-tone audiometry, and researchers tracked whether they later developed dementia.

The results were striking. About 20 percent of participants eventually developed dementia. But among those diagnosed with hearing loss before the age of 70, the ones who wore hearing aids had a much lower risk compared to those who did not. In fact, people with hearing aids were 61 percent less likely to develop dementia.

By comparison, people without any hearing loss also showed reduced risk. Interestingly, for participants diagnosed with hearing loss after 70, hearing aids did not appear to make a difference.

“This finding highlights the importance of early intervention for hearing loss for possible prevention of dementia,” the authors noted.

Experts say the results add to growing evidence that untreated hearing loss can accelerate cognitive decline by isolating people socially and placing extra strain on the brain. By restoring hearing, hearing aids may help keep the brain active and engaged, potentially slowing down dementia.

With dementia rates expected to rise sharply worldwide, this study strengthens the case for early hearing checks and wider use of hearing aids—not just for better communication, but also for protecting long-term brain health.