During adolescence, the influence of dynamic hormonal changes causes a boost in physical growth, development and sexual maturation. Because of that, we need to ensure a balanced and varied diet during this period, with adequate intake of energy and all the macronutrients in the right proportions. The aim of our research was to determine the adequacy of energy and macronutrient intake in a population of healthy adolescents according to national recommendations (Reference values…, 2016). We also examined the possible differences in energy and macronutrient intake among differently active adolescents. On the representative sample of first-year secondary school students (average age 15,3 (± 0,5) years; N = 341), who were included in the ARTOS (Child Development Trends in Slovenia) survey in 2013/14, we obtained data on their energy and macronutrient intake (24-hour dietary recall), physical activity (SHAPES questionnaire) and anthropometric characteristics (body mass and height). The results indicate that 75,1 % of adolescents met the national recommendations for carbohydrates, 74,5 % for proteins and 44,0 % for fats, while only 10,4 % of adolescents met the recommendations for energy intake. In addition, energy and macronutrient intake was significantly higher in very active boys compared to barely or moderately active boys. There were no differences in intake between girls with different activity levels. Adolescents need to be encouraged to meet their energy needs according to gender and physical activity and to reach for higher quality food in appropriate macronutrient proportion.