Fruit juices are known to have a very positive effect on the brain, and help stimulate the brain functions. This is because juices contain natural sugar that enables the brain to function faster, recall information easily and ideate effectively. Thus, one is able to think quickly and with greater clarity. In fact, researchers are going as far as to call it “the ultimate brain fuel”. If you want to get the max out of your brain, you should drink a couple of glasses of a fruit juice of your choice and avoid ‘brain-blockers’ — foods like white flour, refined white sugar and meat.