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Grape and blueberry polyphenols may improve memory

Doctors in this study included 215 healthy men and women, aged 60 to 70, with mild to advanced cognitive decline. They excluded others with powerful recall abilities, those who consumed lots of polyphenols from fruits, tea, and dark chocolate, and those taking omega-3 supplements, all of which might improve memory. 

Participants took a placebo or 300 mg of polyphenol extract from grapes and blueberries, per day. After six months, those taking polyphenols had improved their ability to recall random items from a list. Looking at participants with the most advanced cognitive decline, those in the polyphenol group were better able to recall the times, places, and emotions associated with events they had experienced.

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