Being Overweight May Hasten Brain Ageing: Study
Rukhshan Mir (@rukhshanmir) Published August 04, 2016 | 10:05 PM
PARIS, (APP - UrduPoint / Pakistan Point News - 4th August, 2016) - The brains of middle-aged people who are overweight or obese show signs of accelerated ageing, according to a scientific study released Thursday. Levels of crucial white matter -- connective tissue allowing different regions of the brain to communicate -- were significantly lower in clinically overweight than in lean individuals, researchers found. By that measure, the brain of an overweight person aged 40 appeared to be a decade older, they reported in the journal Neurobiology of Ageing. That ten-year gap remains constant over time as overweight or obese people age.
"As our brains age, they naturally shrink in size," explained lead author Lisa Ronan, a scientist in the department of psychiatry at the University of Cambridge.
People who are "overweight or obese have a greater reduction in the amount of white matter" compared to people of normal weight, she told AFP.
Currently, Ronan said, scientists can only speculate: Does being overweight cause the brain changes, or do low white matter levels cause weight gain? "It's essential that we establish how these two factors might interact, since the consequences for health are potentially serious," senior author Paul Fletcher, also from Cambridge, said in a statement. Ronan and colleagues examined data from nearly 500 volunteers aged 20 to 87.
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