Abstract. Nutrition, which is important for everyone of all ages, is also critical to athletes' overall health, fitness and endurance, long-term exercise performance, and, most importantly, success. Each athlete's diet is unique. On the road to success, athletes follow the example of their coaches, friends, successful and/or famous athletes, and adopt different nutritional practices. However, for various reasons such as body building, fat burning, some moral considerations and the influence of religious beliefs, vegan, vegetarian, ketogenic and intermittent fasting diets are also popular among athletes. usage rates are increasing. As the prevalence of these diets increases, research on this topic is increasing and the effects of popular diets on athletic performance and health status are being investigated. This article provides an extensive overview of popular diets, including the content of diets popular among athletes today, their impact on athlete health and performance, and nutritional principles to consider when using these diets. is discussed comprehensively.