The Consumption of Dietary Supplements among Gym Members in Amman, Jordan

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Mai Abu Yaman
Mohammed O. Ibrahim


prevalence, knowledge, dietary supplement, gym members


Background: Dietary supplements (DS) are considered as a major part of many athletes’ life. Objective: The aim of the study was to determine the prevalence of DS use among gym members in Amman, Jordan. Moreover, to determine their sources of information about DS, and assess their level of knowledge regarding the use of DS. Methods: A cross-sectional study was conducted using validated questionnaire among 397 gym members in the city of Amman, Jordan. The questionnaire included demographic data, use of DS, sources of information of DS, and personal knowledge and attitudes about DS. Results: The results of the study indicated that (146 participants, 36.8%) of participants were between 24–29 years old and that the prevalence of DS use was (70.8%) of the participants.  Most of the study participants were found to obtain their information from sport coaches (37.4%), followed by nutritionist (24.2%) and health staffs (11.1%). Proteins were found to be the most single type of DS used through the users of DS (21.4 %), followed by vitamins (14.0 %). Pearson chi-square statistics revealed that gender was the only variable that make significant difference (p<0.05) regarding the type of DS and the source of information among users of DS. About two-third of the users of DS had sufficient information or knowledge regarding their supplements and nearly the same percentage pay attention to the nutrition facts of these supplements. Statistical analysis program SPSS (version 21) was used and statistical significance set at p-value <0.05. Conclusion: A large proportion of gym members in Amman use DS with a high percentage of proteins and vitamins among the most used DS. Coaches and nutritionists play a key role in counseling gym members about appropriate DS. Actually, gym members need more education programs to increase the percentage of members with high knowledge regarding DS.


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1. Attlee A, Haider A, Hassan A, Alzamil N, Hashim M, Obaid RS. Dietary supplement intake and associated factors among Gym Users in a university community. J Diet Suppl 2017;15(1): 88–97.
2. Nabuco HCG. Factoresasociados con la suplementación de la dieta entre losatletasbrasileños. Nutr Hosp 2016; 33(3): 1–8.
3. Wardenaar FC, Ceelen IJM, van Dijk JW, et al. Nutritional supplement use by Dutch elite and sub-elite athletes: Does receiving dietary counselling make a difference?. Int J Sport Nutr Exerc Metab 2017; 27(1): 32–42
4. Trakman GL, Forsyth A, Hoye R, Belski R. The nutrition for sport knowledge questionnaire (NSKQ): development and validation using classical test theory and rasch analysis. J. Int. Soc. Sports Nutr. 2017; 14(1): 1–11.
5. Kobayashi E, Sato Y, Umegaki K, Chiba T. The prevalence of dietary supplement use among college students: A Nationwide survey in Japan. Nutrients 2017; 9 (11): 1250.
6. Jovanov P, Đorđić V, Obradović B, et al. Prevalence, knowledge and attitudes towards using sports supplements among young athletes. J. Int. Soc. Sports Nutr.2019; 16(1):27.
7. Denham BE. Athlete information sources about dietary supplements: A review of extant research. Int J Sport Nutr Exerc Metab 2017; 27(4): 325–334.
8. Alfawaz H, Khan N, Almarshad A, et al. The prevalence and awareness concerning dietary supplement use among Saudi adolescents. Int. J. Environ. Res. Public Health 2020; 17(10): 3515.
9. Jawadi AH, Addar AM, Alazzam AS, et al. Prevalence of dietary supplements use among gymnasium users. J Nutr Metab 2017; 2017:9219361.
10. Roy KA, El Khoury D, Dwyer JJM, Mountjoy M. Dietary supplementation practices among varsity athletes at a Canadian university. J Diet Suppl 2021; 18(6):614-629.
11. Nabuco HCG, Rodrigues VB, Barros WM, Ravagnani FCP, Espinosan MM, Ravagnani CFC. Use of dietary supplements among Brazilian athletes. Rev. de Nutr. 2017; 30(2): 163–173.
12. Sharif SI, Mohammed A, Mohammed I, Sharif, RS. Evaluation of knowledge, attitude and use of dietary supplements among people exercising in the gym in Sharjah- United Arab Emirates. Phys Med Rehabil Res 2018; 3(5): 1–5.
13. Ronis MJJ, Pedersen KB, Watt J. Adverse effects of nutraceuticals and dietary supplements. Annu. Rev. Pharmacol. Toxicol. 2018; 58(1): 583–601.
14. Tiwari K. Supplement (mis) use in adolescents. Curr. Opin. Pediatr. 2020; 32(4): 471–475.
15. Mazzilli M, Macaluso F, Zambelli S, Picerno P, Iuliano E. The use of Dietary Supplements in fitness practitioners: A Cross-Sectional Observation Study. Int. J. Environ. Res. Public Health 2021; 18(9): 5005.
16. Ruano J, Teixeira VH. Prevalence of dietary supplement use by gym members in Portugal and associated factors. J. Int. Soc. Sports Nutr. 2020; 17:1.
17. Nieper A. Nutritional supplement practices in UK junior national track and field athletes. Br J Sports Med 2005; 39(9): 645–649
18. Alfawaz HA, Krishnaswamy S, Al-Faifi L, et al. Awareness and attitude toward use of dietary supplements and the perceived outcomes among Saudi adult male members of fitness centers in Saudi Arabia. Int J Sport Nutr Exerc Metab 2018; 28(5): 509-514.
19. Abdelbaky A, Althubaiti AA, Aloufi BA. Evaluation of knowledge, attitude and use of dietary supplement and hormones among male gym attendees in Taif City, Saudi Arabia. WFM /MEJFM 2020; 18(1): 176–186.
20. Goston JL, Correia MI. Intake of nutritional supplements among people exercising in gyms and influencing factors. Nutrition 2010; 26(6): 604–611.
21. Wiens K, Erdman KA, Stadnyk M, Parnell JA. Dietary supplement usage, motivation, and education in young Canadian athletes. Int J Sport Nutr Exerc Metab 2014; 24(6): 613–622.
22. El Khoury D, Antoine-Jonville S. Intake of Nutritional Supplements among People Exercising in Gyms in Beirut City. J Nutr Metab 2012; 2012:703490.
23. Aljaloud SO, Ibrahim SA. Use of Dietary Supplements among Professional Athletes in Saudi Arabia. J Nutr Metab 2013; 2013:245349.
24. Mettler S, Bosshard JV, Häring D, Morgan G. High prevalence of supplement intake with a concomitant low information quality among Swiss fitness center users. Nutrients 2020; 12(9): 2595.
25. Chabaiki IJ, Bekadi A, Bechikh MY. Sports supplements: use, knowledge, and risks for Algerian athletes. NAJFNR 2020; 4(7): 231–239.
26. Slater G, Tan B, Teh KC. Dietary Supplementation Practices of Singaporean Athletes. Int J Sport Nutr Exerc Metab 2003; 13(3): 320–332.
27. Naderi A, de Oliveira EP, Ziegenfuss TN, Willems MET. Timing, optimal dose and intake duration of dietary supplements with evidence-based use in sports nutrition. JENB 2016; 20(4): 1–12
28. Dascombe B, Karunaratna M, Cartoon J, Fergie B, Goodman C. Nutritional supplementation habits and perceptions of elite athletes within a state-based sporting institute. J Sci Med Sport. 2010; 13(2): 274–280.
29. Baltazar-Martins G, Brito de Souza D, Aguilar-Navarro M, Muñoz-Guerra J, Plata MdelM, Del Coso J. Prevalence and patterns of dietary supplement use in elite Spanish athletes. J. Int. Soc. Sports Nutr. 2019; 16(1): 30.
30. Phaladi, K. Use and consumer perceptions of dietary supplements in the fitness community of Gaborone, Botswana. [Unpublished master’s thesis]. University of the Western Cape 2020.
31. Braun H, Koehler K, Geyer H, Kleiner J, Mester J, Schanzer W. Dietary supplement use among elite young German athletes. Int J Sport Nutr Exerc Metab 2009; 19(1): 97-109.