Tehran University of Medical Sciences Journal of Nutritional Sciences and Dietetics 5 1-2 2019 01 01 19 25 Ata Pourabassi Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran. Fatemeh-Sadat Fatemi Department of Educational Psychology, Faculty of Psychology and Educational Science, Allameh Tabataba’ee University, Tehran, Iran. Mahdieh Tehrani Moghaddam Department of Educational Psychology, Faculty of Psychology and Educational Science, Allameh Tabataba’ee University, Tehran, Iran. Haniyeh Yavari Department of Educational Psychology, Faculty of Psychology and Educational Science, Allameh Tabataba’ee University, Tehran, Iran. Bahare Seyedhosseini Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran. Amir Hossein Shams School of Rehabilitaion, Tehran University of Medical Sciences, Tehran, Iran. 2019 05 01 Background: Overweight and obesity cause different disorders such as high blood pressure, inflammation, and cardiovascular diseases. So it becomes a major factor for enhancing different mortal diseases. Due to the high tendency to consume fast food among adolescents, this study aims to identify the causes of adolescent’s desire for and fast food consumption. Methods: An interview was carried out with some adolescents to explore the reasons and their consumption rate. Results: The main factors promoting fast food consumption in students can be divided into 4 categories. Also, the students’ motivation in fast food ingestion can be explained in personal, social, and educational reasons. Conclusion: Increasing number of fast food restaurants, peer pressure, parents’ role in choosing proper nutrition, and lack of knowledge about the risks of fast food are the main reasons for increased fast food consumption in adolescents. https://jnsd.tums.ac.ir/index.php/jnsd/article/view/264