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With the right dose at the right time, a cup of coffee could help improve your memory in the long run. In a recent study from the University of California, Irvine, participants watched a series of images and then took either a 200-milligram caffeine pill (equivalent to 2 cups of espresso) or a placebo. The next day, they had to study another set of images and decide what they had already seen, what was new and what was new but similar to the images seen the day before.

Those who had taken the caffeine pills the first day had much better results on the hardest task: identifying what was new but similar.

This boost in long-term memory suggests to researchers that caffeine plays a role in memory consolidation and information storage.

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