A common worry
If you have hearing loss, you have probably seen the headlines that tie it to dementia. In a large national survey, two out of three people with hearing loss said they worry about this, so if it has been on your mind, you are in ordinary company. Here is what the research found, including the parts the headlines and the ads leave out.
The link is real. Across many studies that follow large groups of people for years, those with untreated hearing loss develop dementia somewhat more often than those without. That pattern repeats, and it deserves to be taken seriously.
But studies like these can only show that two things travel together, not that one causes the other. Hearing loss and dementia share risk factors, like age and blood-vessel health. It is also hard to score well on a thinking test you cannot fully hear. Researchers are still working out how much of the link each of these explains.
The best evidence so far comes from a large trial called ACHIEVE, published in 2023. Nearly a thousand older adults with untreated hearing loss were randomly assigned to get hearing aids and support, or a health-education program. After three years, thinking and memory declined at about the same rate in both groups.
One planned analysis of a smaller group with more health risks hinted at a possible benefit, and researchers are studying that further. But the headline result is plain: getting hearing aids did not slow memory decline overall. Hearing aids earn their keep another way, by making today easier.
Hearing loss and dementia are linked in studies, but a link is not a cause.
You may have seen a claim that hearing loss is the biggest treatable risk factor for dementia, with a percentage attached. That number describes whole populations, not your personal odds. It estimates what might change if hearing loss vanished for everyone, and it assumes the link is a cause, which is the very thing still unsettled.
A population estimate is a useful research tool. As a personal prediction for you, it says very little.
Fear is effective marketing. In 2016, the brain-training company Lumosity paid two million dollars to settle charges from US regulators over claims that its games could protect against decline. The claims sold; the evidence was not there.
Ads in the hearing world reach for the same lever, and the dementia link is the heaviest one available. A fair test for any ad: if it implies a product protects your memory, ask which trial showed that. For hearing aids, the largest trial did not. For practice apps, no trial has.
Treating hearing loss is worth it for reasons that hold up right now: following the conversation at dinner, spending less effort to keep up, staying in rooms you were starting to avoid. Those are today reasons, and they do not need a scary headline behind them.
If you are worried about your memory itself, that belongs with your doctor, not with an app. And it may help to know that straining to hear makes anyone hold less of what was said. Words that arrive incomplete are hard to keep. That is effort, not disease.
FAQ
Not so far as research can show. The two are linked in studies that follow people over time, but the strongest trial found that treating hearing loss with hearing aids did not slow memory decline over three years. Whether the link is a cause is still an open question.
No study has shown that. The largest trial, ACHIEVE, found no overall difference in memory decline between people who got hearing aids and people who got health education. Hearing aids are worth wearing for how much easier they make listening today.
No. No app or training program has been shown to do that, and US regulators fined a brain-training company for making claims like it. Listening practice is for something nearer: following words and conversation more easily.
Often it is effort, not memory. When hearing takes work, your attention is spent decoding the words, and less is left for holding on to them. Sentences you struggled to catch are harder to keep. If forgetting worries you outside of listening, mention it to your doctor.
From research that estimates what might change across a whole population if a risk factor disappeared. It is not a personal prediction, and it assumes hearing loss is a cause of dementia, which has not been settled.
Related reading
The free listening check takes a few minutes and shows where words get lost. Practice from there is about one thing: following conversation more easily, today.
