Supreme Garcinia Cambogia and Pure Cleanse You can't study on an empty stomach; countless studies have proved as much. That's why schools in developing countries and poverty stricken areas try to implement feeding schemes so that kids get at least one square meal a day. Science has taken it a couple of steps further by determining that some foods are better at helping you learn than others. And guess what? Quick and easy convenience foods (junk food) aren't on the list.