Many people make another mistake. They decide to eat junk food in order to satisfy their hunger for a while. On the one hand, this decision is smart, because it is bad to exhaust your organism. You require fatigue and energy to be able to work and study. When you have a break between classes, you can eat something to fill your body with energy. You will manage to survive another hour or two after eating junk food. On the other hand, junk food is not a good option for nutrition. When you eat junk food, you fill your body with fat and sugar. You receive energy but you become at risk of gaining extra weight.