Dark Chocolate .This will probably be your GW2 Gold Guide favorite brain boosting food. Chocolate, especially the dark stuff contains compounds called flavonols that can help improve mental focus. Studies show that drinking flavanol rich cocoa helps increase blood flow to your Buy GW2 Gold Guide brain which, in turn, improves your ability to concentrate. A single square of dark chocolate also contains a small amount of caffeine too which also Guild Wars 2 Guide improves mental energy and focus. Eat 2-3 squares of dark chocolate a day. The darker the chocolate the better.