NBC Nightly News with Brian Williams - More Calories, More Memory Loss?

A study published by the American Academy of Neurologists says older people who eat more than 2,100 calories a day have a higher risk of mild cognitive impairment. NBC’s Brian Williams reports.

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Added: Tue Feb 14 03:41:13 UTC 2012
Air date: Tue Feb 14 03:40:40 UTC 2012
Duration: 00:35

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