In July 2025 the Australian Government mailed a letter to every citizen who turned 50 the previous financial year, outlining steps to lower dementia risk.
The outreach reflects a growing focus on preventing dementia, signalling that the condition is not an inevitable part of ageing.
Letter content and national projections
More than 446,000 Australians are estimated to be living with dementia in 2026, and without effective prevention that figure could rise above one million by 2066.
The letter advises recipients to stay physically active, eat a balanced diet, have hearing and vision screened, manage cardiovascular and mental health, control diabetes, quit smoking, limit alcohol, maintain social ties and engage in mentally stimulating activities.
Providing this information is a step forward, but it does not constitute a full national prevention strategy.
Research highlights systemic gaps
A recent study in The Lancet Public Health mapped 61 potentially modifiable risk and protective factors across a socio-ecological framework. About 80 percent of those factors were situated at the individual level, with far fewer linked to relationships, communities or policy environments.
The authors, Dr Jennifer Dunne and Professor Blossom Stephan, note that while advising physical activity is sound, actual participation depends on safe, walkable neighborhoods and available time and resources.
Social connection likewise hinges on affordable transport, inclusive public spaces and opportunities for people with disabilities, those who have stopped driving, or residents of remote areas.
If policies were aligned to remove these barriers, more people could follow the letter’s guidance without facing prohibitive costs or logistical hurdles. Such alignment would likely narrow the gap between advice and action, especially in disadvantaged communities.
Equity and broader responsibility
Income, education, housing, employment, geography, culture, service access and air quality all shape dementia risk and the ability to act on preventive measures.
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A personalised risk score may point to areas for improvement, yet it cannot supply a hearing aid, guarantee bulk-billing appointments, bring health services to remote towns, ensure clean air or build safe exercise spaces.
When campaigns focus mainly on personal behaviour they risk widening health inequities, because people with greater resources can more readily adopt the recommendations.
There is also a danger of blaming individuals; genetics, age and other non-modifiable factors mean that even strict adherence may not prevent dementia.
The National Dementia Action Plan 2024–2034 commits governments to empower “individuals and communities” to minimise risk where possible and to delay onset and progression.
Primary care already incorporates many preventive steps, such as managing vascular risk, supporting smoking cessation, treating depression and addressing sensory loss, yet clinicians cannot overcome unaffordable or inaccessible services through advice alone.
Evidence gaps and data needs
Evidence gaps remain prominent across the prevention agenda. Epidemiological links between lifestyle, clinical and environmental factors and dementia are well documented. Yet proof that altering these factors reduces cognitive decline is still limited, especially for broad population interventions.
Researchers stress that policy evaluations should embed cognitive and brain-health metrics. Transport projects, urban-planning reforms and social-isolation programs could generate valuable data if outcomes are measured from the outset. Such integration would clarify which system changes produce measurable benefits.
Global modelling suggests that addressing a set of modifiable risks could avert a substantial share of cases.
Towards a shared approach
Policy frameworks already exist to influence brain health indirectly. Initiatives that lower cardiovascular disease, curb tobacco use, limit harmful alcohol intake, expand hearing and vision services, improve air quality, and promote education all have potential dementia-prevention effects.