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 NEARLY HALF OF DEMENTIA CASES MAY BE PREVENTABLE





A new study out of Lund University throws a spotlight on something many of us would rather not think about: dementia, and how our daily choices might shape our odds of ending up with it. The surprising part? Nearly half of dementia cases may be tied to risks you can actually change.

The research tracked almost 500 people in their mid-sixties — all of them showing no signs of memory trouble at the start. Over four years, scientists watched for changes inside their brains, zeroing in on damage linked to vascular dementia and Alzheimer’s disease, the two biggest causes of cognitive decline.

So what does this mean for you? Well, the usual suspects are back in the spotlight: smoking, high blood pressure, heart disease, and high cholesterol. Each of these was strongly linked to damage in the brain’s white matter — the network of nerve fibers that keeps everything running smoothly. In short, those habits don’t just mess with your heart; they can quietly chip away at your brain, too.

“We’ve always known lifestyle matters,” says Dr. Sebastian Palmqvist, a senior neurologist at Lund and the Memory Clinic at Skåne University Hospital, “but most research lumps all dementia together, when in fact, different risks may drive different kinds of brain damage.”

The Lund team also kept a close eye on amyloid β and tau — proteins that build up in Alzheimer’s. They found that people with diabetes had more amyloid β, and those with lower BMI saw tau pile up faster. These findings are early, but they hint at how different risks might nudge the brain in different directions.

And here’s the good news: you’re not powerless. Adopting healthier habits — quitting smoking, getting your blood pressure under control, keeping your cholesterol in check — may help hold off both vascular dementia and Alzheimer’s symptoms. That’s especially important because many people with dementia have more than one type of brain damage happening at once.

“Even if you’re worried about Alzheimer’s, improving your vascular and metabolic health is still worth it,” Palmqvist says. “You might be reducing the combined effects of several kinds of brain changes at the same time.”

The takeaway is simple: while you can’t change your age or your genes, you have a say in many of the risks that matter most. Taking care of your heart and your health might be the best way to keep your mind sharp for years to come.

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