WHO Updates Dementia Prevention Guidelines, Elevates Hearing Loss and Hearing Aid Use to Core Public Health Priorities

The World Health Organization's updated dementia prevention guidance — its most significant revision since 2019 — estimates that addressing untreated hearing loss could prevent approximately 7% of dementia cases globally, and now explicitly recommends hearing aid use for those with documented hearing loss. The World Health Organization (WHO) has released updated dementia prevention guidelines that place hearing loss squarely at the center of a public health strategy for brain health. The revised guidance expands the list of modifiable risk factors, with untreated hearing loss identified as one of the largest preventable contributors to cognitive decline — accounting for an estimated 7% of dementia cases at the population level. The update is the WHO's most substantial revision to its dementia risk-reduction framework since 2019, and it signals a meaningful shift in how the agency frames hearing care: no longer a quality-of-life consideration alone, but a core brain health intervention.