Objective: To examine dietary habits amongst adolescents. Subjectis and Methods: The respondents comprised of a total of 234 students from the first to the fifth grade of Medical Department at the Vinkovci-based Dr Andrije Štampara Medical and Veterinary School. A standardised questionnaire on both dietary habits and lifestyle amongst adolescents was used as a research instrument - Questionnaire on Eating Habits and Lifestyles of Adolescents (EHLA Questionnaire). The questionnaire comprised of 12 items. Results: The respondents, 78 (33.6%) stated that their dietary habits changed significantly upon enrolling secondary school. Moreover, those questioned who live on their own or with a roommate significantly more frequently eat pizza (p = 0.03) and drink fruit juices (p = 0.02), whilst those who live with their family significantly more often eat meat and poultry (p = 0.003), as well as fish ( p = 0.02). They stated that they eat bread 7 times a week (interquartile range 1.5-7), and they drink milk 5.5 times a week (interquartile range 1.5-7). Alcoholic beverages are consumed commencing from the first grade of secondary school. Male students drink significantly more beer (p <0.001) and female students drink coffee / tea (p = 0.03). The respondents attending the fifth grade more frequently eat raw vegetables (p = 0.009), fish (p = 0.004) and eggs (p = 0.002), whilst lower grade students are significantly more likely to eat dairy products (p <0.001), bread / cereals (p = 0.01) and drink light carbonated drinks (p = 0.02). Teenagers spend only 0.5 times a week doing sports (interquartile range from 0 to 3.5 times). 180 of those questioned (76.92%) estimated to have normal body mass. Conclusion: Dietary habits amongst adolescents are poor. Final grade students have healthier eating habits. There are differences concerning the lifestyle, as well as the age and gender.