Teenagers often suffer from eating disorders, seize stressful situations, and mope. This is the age when you go out of parental control in food, pocket money appears and they make decisions about nutrition on their own. This is a time of body restructuring, mood swings, often dislike of oneself due to the age of the "ugly ducklings". We want to give you a tool and a cheat sheet to improve the quality of life, to tell you that what is happening to you is normal. That food is like fuel for a car: the better its quality, the faster it will go.