Zehouani, Ali AbdelkaderSouidi, BachirZouma, ChaimaKhalfa, Ali2025-07-132025-07-132025http://dspace.univ-temouchent.edu.dz/handle/123456789/6600Dietary supplements play a significant role in the context of physical activity practice, as they contain a high concentration of nutrients, making them easily accessible. Athletes, particularly bodybuilders, have increased needs for macro- and micronutrients, making it essential to compensate for these losses. Even a balanced diet does not always meet these specific nutritional requirements. Therefore, considering the use of appropriate supplements can be beneficial. In this regard, our objective is to evaluate the consumption of dietary supplements, such as proteins, omega-3 fatty acids, and vitamins, among athletes. This study was conducted with 100 athletes from the Wilaya of Ain-Témouchent. The results reveal that 36% of the athletes do not use these supplements, while 64% consume them to develop muscle mass, increase strength, and combat fatigue. The most commonly used dietary supplements were vitamins (53.12%), including vitamin C, B-complex vitamins, and vitamin D, followed by trace elements (37.5%), proteins (37.5%), with minerals and omega-3 representing moderate consumption types at similar proportions (23.43%), and dietary fibers (12.5%). Among the deficient population, (55%) had a deficiency, with vitamin D deficiency at 43% and iron deficiency at 40%, respectively. In conclusion, a large part of the athletic population consumed dietary supplements for various reasons. This consumption could be beneficial for their health. Therefore, evidence- based information is important to prevent the inappropriate use of dietary supplements by consumers.frDietary supplements, athlete, consumption, Ain-Témouchent.Thesis