Tehran University of Medical Sciences Journal of Nutritional Sciences and Dietetics 1 2 2015 10 05 93 97 EN Tohid Seifbarghi Sports Medicine Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran Somaye Yosaee Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran Farzin Halabchi Sports Medicine Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran Reza Mazaheri Sports Medicine Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran Kurosh Djafarian Department of Clinical Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran 2015 10 05 2015 10 05 Background: The aim of this study was to determine the type and frequency of dietary supplements use among elite soccer players in 2011/12 season of Iran’s Premier Football League. Methods: This was a cross-sectional study. We randomly selected 13 teams from 18 teams in 2011/2012 season. All players of each team took part in our study. A total  of  234  soccer  players  enrolled  in  the  study.  Data were collected  in seven-point times using a questionnaire. Results: All players consumed at least one single supplement. The most common used  supplements  among athletes were  vitamins  C  and  E.  No  significant association was  found  between  position  played  and  the type  or frequency of supplements use by athletes (p  > 0.05). There was no significant relationship between the ranks of teams at the end of season and types or frequency of dietary supplements consumed by players (p > 0.05). Conclusion: Our findings indicate that the usage of dietary supplements among Iranian elite soccer players is prevalent. Future studies are required to reveal the beneficial and potential hazards of these supplements on athletes’ physical performance and their health. https://jnsd.tums.ac.ir/index.php/jnsd/article/view/14 https://jnsd.tums.ac.ir/index.php/jnsd/article/download/14/14