Hearing Aids Linked to 33% Lower Dementia Risk—Why Early Prescription Matters

New research suggests that older adults prescribed hearing aids had a 33% lower risk of developing dementia, highlighting the importance of treating hearing loss early. PeopleImages/Shutterstock

Hearing loss affects roughly one in three adults between the ages of 65 and 74, making it one of the most common health conditions associated with aging. However, it is often dismissed as an unavoidable part of getting older, but researchers increasingly view it as something much more important: a modifiable risk factor for dementia. New research published in Neurology found that older adults with moderate hearing loss who were prescribed hearing aids had a 33% lower risk of developing dementia over seven years compared with similar adults who did not receive hearing aids.

While hearing aids did not significantly improve scores on memory tests during the study, they appeared to reduce the likelihood of developing dementia over time. Combined with several other recent studies, the findings suggest that treating hearing loss early may help protect long-term brain health.

The Study Found a 33% Lower Risk of Dementia

Researchers followed 2,777 Australian adults with moderate hearing loss who did not have dementia when the study began. During the seven-year follow-up, some participants were prescribed hearing aids while others were not. After adjusting for factors such as age and existing health conditions, researchers estimated that participants who received hearing aids had a 5% risk of developing dementia compared with 7.5% among those who did not receive hearing aids. That translated into a 33% lower relative risk of dementia for the hearing-aid group.

“Hearing loss is more common as we age, and previous research has found it may increase the risk of memory and thinking problems, including dementia,” said study author Joanne Ryan, Ph.D., of Monash University. “While we didn’t find a difference in cognitive scores, our study suggests that for older adults with hearing loss, using hearing aids may lower the risk of dementia and cognitive impairment.”

Researchers also found a 15% lower risk of overall cognitive impairment, including both cognitive decline and dementia, among participants prescribed hearing aids.

Wearing Hearing Aids More Often Appeared to Provide Greater Benefits

The study also uncovered another encouraging finding. Participants who reported using their hearing aids more consistently experienced progressively lower dementia risk than those who wore them less frequently. In other words, simply receiving a prescription may not be enough. The devices appear to provide the greatest benefit when they are actually worn. Researchers say this supports the importance of proper hearing-aid fitting, follow-up care, and ongoing use. Consistency may be just as important as early treatment.

Hearing Loss May Affect the Brain in Several Ways

Scientists have proposed several explanations for why untreated hearing loss could contribute to dementia. The growing attention isn’t accidental. The 2024 Lancet Commission identified untreated hearing loss as one of the leading modifiable risk factors for dementia worldwide, meaning it’s among the few risks people may be able to address through medical treatment and lifestyle changes.

When hearing declines, the brain must work harder simply to interpret sounds, leaving fewer cognitive resources available for memory and thinking. Hearing loss may also accelerate changes in brain structure associated with aging. In addition, difficulty hearing often leads to reduced conversations and social withdrawal, both of which are independently associated with cognitive decline. Experts believe all of these factors may contribute to increased dementia risk over time.

Early Treatment May Matter More Than Waiting

Researchers believe earlier treatment may preserve communication, social engagement, and cognitive stimulation before long-term changes associated with hearing deprivation become established.

Several recent studies suggest that timing could be critical. The Framingham Heart Study found that hearing-aid users who addressed hearing loss before age 70 experienced substantially lower dementia risk than those who delayed treatment. While hearing loss becomes more common with age, experts recommend evaluation as soon as communication difficulties begin affecting daily life.

Waiting years before seeking treatment may allow changes associated with hearing deprivation to accumulate. Early intervention gives both the ears and the brain a better opportunity to adapt.

Hearing Aids Are Only One Piece of Brain Health

Although the findings are encouraging, hearing aids should not be viewed as a guaranteed defense against dementia. Researchers continue to emphasize that cognitive health depends on many interacting factors, including physical activity, blood pressure control, diabetes management, sleep, social engagement, education, and cardiovascular health. Hearing care simply addresses one important (and potentially modifiable) risk factor. The 2024 Lancet Commission on dementia prevention also identifies hearing loss as one of the leading modifiable contributors to dementia risk. Treating hearing loss works best when combined with other healthy lifestyle habits.

Many People Who Could Benefit Still Do Not Wear Hearing Aids

Despite growing evidence, hearing-aid use remains surprisingly low. Studies suggest that a large percentage of adults with clinically significant hearing loss either delay treatment or never obtain hearing aids at all. Cost, stigma, lack of awareness, and limited access to hearing care continue to create barriers.

Since the FDA authorized over-the-counter hearing aids for adults with perceived mild-to-moderate hearing loss, experts say cost barriers have begun to decline, although prescription devices remain appropriate for many people with more significant hearing impairment. Addressing these barriers may become an important public health strategy for healthy aging.

When Should You Get Checked?

Audiologists generally recommend scheduling a hearing evaluation if you regularly ask people to repeat themselves, struggle to follow conversations in noisy places, or notice that family members complain the television volume is too loud.

Many people gradually adjust to hearing loss without realizing how much they are missing. Family members often notice the problem first through repeated requests to repeat conversations or increasing television volume. Other common warning signs include avoiding restaurants because conversations are difficult to follow, misunderstanding phone conversations, or feeling exhausted after trying to listen in noisy environments.

Scheduling a hearing evaluation when these signs appear is a simple step that could have long-term health benefits. Even if hearing aids are not immediately recommended, monitoring hearing over time allows treatment to begin when appropriate.

Better Hearing May Mean Better Brain Health

While hearing aids are not a cure for cognitive decline, multiple studies now suggest they may reduce dementia risk, especially when hearing loss is treated early and devices are used consistently. Because hearing loss is both common and treatable, it represents one of the few modifiable risk factors that individuals can address today. If you or a loved one has noticed changes in hearing, talking with a healthcare provider or audiologist may be about much more than hearing conversations more clearly.

Researchers caution that hearing aids are not a guarantee against dementia, and this study found an association rather than proof of cause and effect. Even so, the growing body of evidence suggests that protecting your hearing may also help protect your brain. For many older adults, scheduling a hearing test could become one of the simplest (and most important) investments in healthy aging.

Have you or someone you love delayed getting hearing aids? Do these findings change how you think about hearing health? Share your thoughts in the comments below.