Scientists have identified 61 potentially modifiable risk factors for dementia, far more than the handful of diet and exercise habits most prevention campaigns focus on.
The analysis, published September 9, 2026 in The Lancet Public Health by researchers at Curtin University in Australia, argues that current messaging places too much weight on personal behavior and too little on the environmental and social conditions that shape brain health across a lifetime.
Sitting alongside the familiar lifestyle advice are factors including air quality, social connection, housing conditions, neighborhood safety, education, healthcare access, and economic circumstances.
Of the 61 factors reviewed, 49, or 80 percent, sit at the individual level, according to the Curtin research team, while far fewer capture the wider structural drivers.
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Where the prevention message falls short
The imbalance matters, the authors argue, because many risks are not truly a matter of personal choice.
Being physically active depends on having safe streets and affordable places to move.
Staying socially connected depends on transport, community life, and being well enough to leave the house.
"Where people live, the education they receive, the healthcare they can access, the air they breathe and the social and economic conditions they experience across their lives can all shape brain health," said Dr. Jennifer Dunne, lead author and researcher at Curtin's Dementia Centre of Excellence, to Curtin.
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What individuals can and cannot control
For readers already following the familiar prevention checklist, the paper is not a reason to abandon it.
Individual-level habits such as physical activity, a balanced diet, hearing care, not smoking, and management of blood pressure and diabetes remain part of the picture.
But the authors argue that stopping there misses much of the equation, because the ability to act on individual factors is itself shaped by income, housing, and neighborhood.
Simone Reppermund, a cognitive disorder researcher at the University of New South Wales who was not involved in the paper, told ABC News that behavior-focused messaging often neglects those wider drivers.
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The framing echoes earlier prevention research suggesting that addressing several health risks together may extend healthy years, rather than chasing any single habit in isolation.
Turning evidence into policy
The Curtin team frames the shift as one from individual willpower to population-wide conditions.
"The next step is turning this evidence into action. Dementia prevention should support healthy choices while also improving education, neighbourhoods, healthcare access and other social conditions that shape brain health across the population throughout a person’s life," said Professor Blossom Stephan, co-author and Chair in Dementia at Curtin's enAble Institute, to Curtin.
Anyone worried about brain health, or noticing memory changes in themselves or a family member, should raise it with a doctor rather than acting on new prevention claims alone.
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Roughly 57 million people currently live with dementia worldwide, a figure the researchers cite as projected to reach 139 million by 2050.
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This article is made and published by Ida-Marie Palm Varbæk, who may have used AI in the preparation.