edamame

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Edamame
The beans are rich in choline, a building block for a neurotransmitter that helps relay information throughout the nervous system. Boston University researchers showed that higher choline intake is linked to better scores on verbal and visual memory tests, and MRI scans revealed that the participants who ate choline-rich foods also had fewer white matter hyperintensities, spots on the brain that are considered possible indicators of increased risk for Alzheimer's.

An alternative: turkey or chicken.

Next: Dr. Oz's 5 ways to keep your brain sharp
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