Journal of Research in Medical Sciences1735-1995161020111015Supplement consumption in body builder athletes68496849ENJahangirKarimianParivashShekarchizadeh EsfahaniInstructor, School of Management and Informatics, Isfahan University of Medical Sciences, Isfahan, Iran. shekarchizadeh@mng.mui.ac.ir201102232011092920110827BACKGROUND: Widespread use of supplements is observed among world athletes in different fields. The aim of this study was to estimate the prevalence and determinants of using supplements among body builder athletes.METHODS: This cross-sectional study was conducted on 250 men and 250 women from 30 different bodybuilding clubs. Participants were asked to complete a self-administered standardized anonymous check-list. RESULTS: Forty nine percent of the respondents declared supplement use. Men were more likely to take supplements than women (86.8% vs. 11.2%, p = 0.001). Reasons for using supplements were reported to be for health (45%), enhancing the immune system (40%) and improving athletic performance (25%). Most athletes (72%) had access to a nutritionist but underused this resource. Coaches (65%) had the greatest influence on supplementation practices followed by nutritionists (30%) and doctors (25%) after them.CONCLUSIONS: The prevalence of supplement use among bodybuilders was high. Sex, health-related issues and sport experts were determinant factors of supplement use.KEYWORDS: Supplements, Athletes, Bodybuilder.