Have you ever noticed that from time to time during the exam preparation period your mind switches to thinking about what you can eat? At the time when you are trying to focus, your mind is craving for food, in particular, sugary snacks that apparently boost your energy and improve your concentration. But you have probably noticed as well, that very soon you will be craving for chocolate again… and again. Eating lots of sugary and fattening foods during concentration times comes unnoticed which over time leads to such unpleasant problems as overweight, allergies, and high cholesterol.