Brain regions associated with cognition are smaller in older people who are obese,compared with thinner people, the obese older people had brain that looked up to 16 years older than their true age.
Brain shrinkage has been linked to dementia.
Prior studies have suggested that being obese in middle age increases the risk of dementia in later life.
It has been suggested that fat clogges up the blood arteries,reducing blood and oxygen flow to the brain.
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