In July 2026, the World Health Organization published new guidelines on reducing the risk of cognitive decline and dementia. One line from them has travelled fast, including across our own feeds: up to 45% of dementia risk could be prevented or delayed. Hearing loss is on the list of factors those guidelines address, so we want to walk through what the guidance actually says, and just as importantly, what it does not.
What the guidelines actually say
The WHO estimates that more than 57 million people are living with dementia worldwide, with nearly 10 million new diagnoses every year. Alzheimer disease accounts for roughly 60 to 70% of those cases.
The headline figure is that up to 45% of dementia risk can be attributed to modifiable risk factors, meaning things that can potentially be changed. The guidelines name tobacco use, alcohol use, social isolation, physical inactivity, air pollution, high blood pressure, diabetes and high cholesterol, alongside hearing loss.
“We know more today than ever before about what drives dementia risk, and these guidelines translate that knowledge into action,” said Dr Tedros Adhanom Ghebreyesus, WHO Director-General.
Where hearing care fits in
For our field, the notable part is that hearing aids are named directly. The guidance states that hearing aids may be offered to adults with hearing loss as part of risk-reduction strategies.
That is a meaningful step. Hearing loss has been discussed as a dementia risk factor for years, but having the WHO place hearing care inside a formal risk-reduction guideline gives the conversation considerably more weight.
What this does not mean
It is worth being precise, because a headline like this is easy to read as more than it is. The WHO is not saying that hearing aids prevent dementia. The phrase “may be offered” is deliberately measured. It describes an option worth considering as part of a broader plan, not a guaranteed outcome.
Researchers are still separating cause from association. What we do know is that untreated hearing loss makes conversation harder, which can pull people away from the social contact and mental stimulation that support brain health. A large US trial called ACHIEVE found that hearing treatment cut the rate of cognitive decline by close to half over three years in older adults who were already at higher risk, though the same effect did not show up across the study population as a whole.
What to actually do with this
The practical takeaway is not complicated. If you or someone you love has been putting off a hearing test, this is a good reason to stop putting it off. Most people wait years between first noticing a change and acting on it, and there is nothing to gain from waiting.
A hearing test is quick and painless. If there is a loss, you have options. If there is not, you have peace of mind and a baseline on file to measure against later.
Every one of our Colorado studios offers hearing tests, and you are welcome to bring a family member along.
Sources:
https://www.who.int/news/item/15-07-2026-new-who-guidelines--up-to-45--of-dementia-risk-could-be-prevented-or-delayed
https://www.nih.gov/news-events/nih-research-matters/hearing-aids-slow-cognitive-decline-people-high-risk