What is blue, sweet and juicy and may help ward off those nagging memory lapses? If you guessed blueberries, you would be right. Americans apparently cannot get enough of the delicious fruit. In 2008, the latest year that data are available, per capita blueberry consumption in the U.S. reached an all-time high of 12.3 ounces, roughly the size of one standard supermarket carton—an increase from 9.2 ounces in 2007. Whether we are eating more blueberries because they are good for us or just taste good is anyone’s guess, but now there is even more reason to load up the shopping cart with plump Vaccinium cyanococcus: they may protect our brain.