For years, hearing loss has been treated as a standalone issue, something that affects communication and quality of life, but not much else. New guidelines from the World Health Organization tell a different story. Released in 2026, the WHO’s updated dementia risk reduction guidelines identify hearing loss as one of the most significant modifiable risk factors for cognitive decline, and the evidence linking hearing loss and dementia has never been stronger.
How Common Is Hearing Loss, Really?
Globally, about one in five people experience some form of hearing loss. Despite effective management options being available, hearing loss often goes undiagnosed and unaddressed, particularly among older adults. It’s easy to put off a hearing check, but the WHO’s findings suggest that delay may carry a bigger cost than most people realise, both for communication and for long-term brain health.
Does Hearing Loss Cause Dementia? The Link Explained
The WHO guidelines outline several mechanisms linking untreated hearing loss to cognitive decline. These include social isolation, increased cognitive load as the brain works harder to process sound, cardiovascular effects, and broader neurobiological changes. Left unaddressed, hearing loss can trigger a cascading effect: reduced social engagement, lower mental wellbeing, and less physical activity, all of which raise the risk of cognitive decline and dementia.
In fact, the WHO estimates that if hearing loss was eliminated at a population level, around 7% of dementia cases could potentially be prevented, one of the largest single contributions of any modifiable risk factor identified in the guidelines.
Can Hearing Aids Help Prevent Dementia?
Based on updated evidence, the WHO has issued a conditional recommendation that hearing aids may be offered to adults with hearing loss specifically to help reduce the risk of cognitive decline and dementia. This is a shift from the 2019 guidelines, where the evidence wasn’t yet strong enough to support a formal recommendation.
It’s worth noting the WHO is careful to frame this appropriately. Hearing aids should be used to address hearing loss itself, not solely as a dementia prevention tool. But the flow-on benefits for brain health add a compelling reason to take hearing loss seriously and act on it sooner rather than later.
The Access Gap in Hearing Care
Globally, over 400 million people with hearing loss could benefit from hearing devices, yet current estimates suggest only around 17% of that need is being met. Barriers include stigma, low awareness, cost, and limited access to hearing care, particularly in under-resourced areas. The WHO is calling for better public health campaigns, more accessible care pathways, and earlier screening, ideally from age 50 onwards, to close this gap.
Frequently Asked Questions
Yes. WHO guidelines identify hearing loss as one of the most significant modifiable risk factors for cognitive decline, largely through its effects on social engagement, cognitive load and brain health over time.
Current evidence, while still developing, suggests hearing aid use may help lower the risk of cognitive decline in some adults with hearing loss. The WHO now conditionally recommends hearing aids be offered for this reason, in addition to their communication benefits.
WHO guidance calls for hearing screening from age 50 onwards, followed by prompt diagnosis and treatment where needed. Earlier assessment can also be worthwhile if you notice changes in your hearing.
Book a Hearing Check in Noosa
If you’ve been putting off a hearing check, this is a good reason to stop waiting. Addressing hearing loss isn’t just about hearing better today, it may also be one of the more meaningful, modifiable steps you can take for your long-term cognitive health.
At Noosa Hearing, our independent, audiologist-led team can assess your hearing and talk you through your options, with no pressure and no obligation.
4/16 Lanyana Way, Noosa Heads QLD 4567 | 07 5231 8867
References
1. World Health Organization. Risk reduction of cognitive decline and dementia: WHO guidelines, second edition. Geneva: World Health Organization; 2026.
2. Livingston G, Huntley J, Liu KY, Costafreda SG, Selbæk G, Alladi S et al. Dementia prevention, intervention, and care: 2024 report of the Lancet Standing Commission. Lancet. 2024;404(10452):572–628. https://doi.org/10.1016/S0140-6736(24)01296-0
3. Haile LM, Kamenov K, Briant PS, Orji AU, Steinmetz JD, Abdoli A et al. Hearing loss prevalence and years lived with disability, 1990–2019: findings from the Global Burden of Disease Study 2019. Lancet. 2021;397(10278):996–1009. https://doi.org/10.1016/S0140-6736(21)00516-X
4. World report on hearing. Geneva: World Health Organization; 2021. https://iris.who.int/handle/10665/339913
5. Griffiths TD, Lad M, Kumar S, Holmes E, McMurray B, Maguire EA et al. How can hearing loss cause dementia? Neuron. 2020;108(3):401–12. https://doi.org/10.1016/j.neuron.2020.08.003
6. Yeo BSY, Song H, Toh EMS, Ng LS, Ho CSH, Ho R et al. Association of hearing aids and cochlear implants with cognitive decline and dementia: a systematic review and meta-analysis. JAMA Neurol. 2023;80(2):134–41. https://doi.org/10.1001/jamaneurol.2022.4427
7. Yang Z, Ni J, Teng Y, Su M, Wei M, Li T et al. Effect of hearing aids on cognitive functions in middle-aged and older adults with hearing loss: a systematic review and meta-analysis. Front Aging Neurosci. 2022;14:1017882. https://doi.org/10.3389/fnagi.2022.1017882
8. Curran E, Chong TWH, Godbee K, Abraham C, Lautenschlager NT, Palmer VJ. General population perspectives of dementia risk reduction and the implications for intervention: a systematic review and thematic synthesis of qualitative evidence. PLoS One. 2021;16(9):e0257540. https://doi.org/10.1371/journal.pone.0257540
9. Hearing aid service delivery approaches for low- and middle-income settings. Geneva: World Health Organization; 2023. https://iris.who.int/handle/10665/376092
10. Hearing screening: considerations for implementation. Geneva: World Health Organization; 2021. https://iris.who.int/handle/10665/344797
