Healthy behaviors can prevent dementia, finds study

Reviewed by Emily Henderson, B.Sc.Jun 9 2021

A new Alzheimer's disease drug will hit the market soon, the first in nearly two decades. But some experts say the evidence for it isn't terribly strong and worry that it may cost a lot.

Still, the announcement of its approval by the U.S. Food and Drug Administration made headlines nationwide. The attention reflects the toll dementia takes on patients, families and society, and the lack of good treatment options.

Meanwhile, millions of adults could lower the chance that they'll ever need a drug like that. To do so, they will need to work with their primary care providers and use the power of prevention to keep their brains healthy.

That's why a national panel of experts including the University of Michigan's Deborah Levine, M.D., M.P.H., recently published a guide for primary care providers on this topic as an official Scientific Statementfrom the American Heart Association.

People dread Alzheimer's disease, she said. Helping people understand that they can prevent or slow future dementia by taking specific steps now could motivate them to increase their healthy behaviors for a positive effect.

The first step: to recognize that dementia risk is higher among people with seven major modifiable risk factors.

They are: depression, hypertension, physical inactivity, diabetes, obesity, hyperlipidemia, poor diet, smoking, social isolation, excessive alcohol use, sleep disorders and hearing loss.

The second step: to help patients take steps to lower their dementia risk by using medication, lifestyle change and other interventions.

Reducing blood pressure, blood sugar, cholesterol, tobacco and alcohol use, depression symptoms and body mass index, and increasing physical activity, intake of healthy foods and social connections can all lower future dementia risk.

Decades of research has shown this, though the size of the effect varies depending on the risk factor in question.

Dementia is not inevitable. Evidence is growing that people can better maintain brain health and prevent dementia by following healthy behaviors and controlling vascular risk factors."

Deborah Levine, MD, MPH, Primary Care Provider, University of Michigan Health, University of Michigan

These strategies can help preserve cognitive function and lower risk for heart attacks and strokes, said Levine, who heads the Cognitive Health Services Research Program and sees patients at the Frankel Cardiovascular Center.

"We need to address the significant disparities that lead women, Black, Hispanic and less-educated Americans to have a much higher risk of dementia," said Levine, a member of the U-M Institute for Healthcare Policy and Innovation.

She added that it's never too late in life to start working on cognitive risk factor control.

"We have no treatments that will halt dementia - so it's important to protect your brain health."