Jan. 2, 2007)--
Excess weight could be sapping your brainpower. French researchers recently measured the body mass index (BMI--a measurement of weight in relation to height) of more than 2,000 middle-aged healthy volunteers and then tested their memory. Slimmer participants (average BMI: 20) could remember 9 of 16 words on the test, while heavier people (BMIs of around 30) could recall only 7 words. When they were retested 5 years later, the heavier group had lost more memory than the slimmer group
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