Obesity poses 'dementia time bomb'

By Hum
in Science News & Discussion

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Ever-growing waistlines could result in a big increase in the number of people who develop dementia in the future, researchers have warned.

Previous studies have shown that being overweight in middle age increases the odds of developing the mental disorder.

Data presented at the European Congress on Obesity suggests stemming the rise in obesity will cut dementia.

The Alzheimer's Society charity said regular exercise and a healthy weight were important for reducing risk.

Piling on too many pounds is known to be bad for the body, but there is growing evidence that it is also bad for the mind.

Nobody knows exactly what causes dementias such as Alzheimer's disease, but body weight appears to be a risk factor.

One study of 8,500 Swedish twins showed that those with a body mass index (BMI) greater than 30, who are classified as obese, were almost four times as likely to develop dementia as those with a normal BMI.

Even those who were clinically overweight, a BMI between 25 and 30, were 71% more likely to develop dementia.

In England 24% of men and 26% of women are obese.

Researchers from the UK Health Forum used computer models to compare what would happen if obesity rates stayed the same or increased to 46% of men and 31% of women by 2050, which has been predicted by some groups.

They said rates of dementia would go from 4,894 cases in every 100,000 people over 65 to 6,662 cases in every 100,000 people over 65.

Keeping obesity levels constant would save around ?940m in dementia care, the study predicted.

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