Much of dementia risk runs through factors you can influence

The World Health Organization makes a point worth repeating for carriers: age is the strongest known risk factor for dementia, but dementia is not an inevitable part of aging. The WHO says people can reduce their risk of cognitive decline and dementia by acting on factors within their control.

It names several: staying physically active, not smoking, avoiding harmful drinking, controlling weight, eating a healthy diet, and keeping blood pressure, cholesterol, and blood sugar in healthy ranges. Depression, social isolation, low educational attainment, cognitive inactivity, and air pollution round out the list.

For carriers, the genotype is only one input. You can’t change it, but you can act on the factors around it, and the WHO’s list reframes the situation from waiting and worrying to doing something concrete, ideally early, when interventions have decades to compound.

None of this promises prevention, and how much any one person can shift their risk is uncertain. But the direction is encouraging: lifestyle and medical management plausibly matter, possibly more for those starting from higher risk.