We didn't really need another reason to lose weight, but headlines last week provided one anyway: news that as your body gets larger, your brain may be getting smaller. That's a little overdramatic, to be sure, but it is now probably reasonable to add dementia to the ever growing list of obesity-related illnesses. For some time, researchers have known that carrying a lot of extra weight is not only linked to chronic diseases like arthritis and cancer but may also be a risk factor for brain diseases like Alzheimer's. And now, using sophisticated brain scans, scientists may be a step closer to...
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