Proper nutrition is key in the process of normal growth and development in children and adolescents. In the adolescent period, very important life habits are created that are later reflected on the quality of life in adulthood and it is important to properly target them to proper living habits. The aim of this study was to determine difference in dietary habits and key elements of nutritional status in adolescents with proper nutrition education in school with adolescents with none nutrition education. A total of 31 students participated; out of which 15 were direction nutritionist technician (10 girls, 5 boys) and 16 students dental technician direction (10 girls, 6 boys). The average age is 18.03 years (with the associated sd = 0.018). Used methods are a questionnaire of nutritional habits and factors affecting eating habits. The height was measured by a meter with a centimeter band, as well as the hip and waist circumference. Method of bioelectric impedance is used for weight measurement on the OMRON BF511 device which also provided data of body composition. Results have shown that nutrition knowledge is not necessarily related to better proper eating habits or body composition status. Significantly, nutritionist technicians provide greater importance to the number of calories intake per day, as well that boys intake a greater amount of liquid than girls. It is confirmed that students with a higher body mass index are more dissatisfied with their body shape and are more dissatisfied with their body weight. From the results it can be concluded that greater attention needs to be paid to the creation of good nutrition and life habits in adolescents, both in education and in the family.