Staying Fit
A surprising and mysterious trend has arisen in recent years that may help point us toward a cure for dementia: Rates of Alzheimer’s disease in the U.S. are actually dropping. Indeed, your risk may be lower than that of your parents or grandparents.
The percent of Americans age 65-plus with dementia, including Alzheimer’s, fell 30 percent from 2000 to 2016, a 2022 Rand Corp. study found. “I think what it means is that a diagnosis of dementia is not cast in iron,” says Albert Hofman, M.D., chair of the Department of Epidemiology at the Harvard T.H. Chan School of Public Health. “We can influence this.”
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In a 2019 study, Hofman found rates had fallen 13 percent per decade over the previous 25 years in North America and Europe — a stretch of time when there were no drugs on the market to treat or prevent changes in the brain due to Alzheimer’s.
7 healthy habits may be the reason
Since about 75 percent of people with Alzheimer’s also have problems with the blood vessels in their brain — leaks, narrowing and damage to tiny arteries can kill off brain cells and cause dementia — Hofman suspects “all the things we’ve done in the last 50 years to prevent heart disease and stroke may be related to lower risk for dementia and Alzheimer’s.”
In addition to not smoking, those include:
1. Keeping blood pressure and blood sugar levels healthy. High blood pressure and diabetes increase risk for thinking and memory problems that may precede dementia or Alzheimer’s by 41 percent or more. They can harm brain cells by damaging blood vessels in the brain, boosting inflammation and encouraging the growth of Alzheimer’s plaques and tangles.
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