Introduction. As you know, trace elements play an important role in the life of every living cell. Deficiency of trace elements or their unbalanced ratio in food can lead to profound metabolic disorders and cause the development of a number of diseases, including "sports anemia". The content of trace elements in the blood depends on the nature of muscle activity, its volume, intensity and fitness of the body. Under the influence of systematic training, in parallel with the growth of muscles and their need for oxygen, the content of iron, copper, and manganese in the blood cells increases. At the same time, the physical performance of athletes also increases. In the practice of sports, there are very few clear recommendations for the consumption of microelements with food for athletes of various qualifications, age and gender. It is possible to say exactly how much alimentary iron (Fe), copper (Cu) and manganese (Mn) is necessary to satisfy the body's need for microelements only after studying the balance of microelements in the body of athletes, which is the most relevant today. The purpose of this study was to study the daily balance of microelements in the body of swimmers of high qualification categories. Research methods. The elemental profile of the organism of the examined contingent was established on the basis of urine analysis (morning, middle portion collected in a special container). The analysis was carried out by inductively coupled argon plasma mass spectrometry (ICP-MS) on a Nexion 300D + NWR213 device (PerkinElmer, USA), as well as the effectiveness of prescribed drugs was assessed by indicators of capillary blood. Hemoglobin and serum iron were determined using the appropriate standard kits, hematocrit and erythrocytes were determined using conventional methods. Statistical processing of the obtained data was carried out using Microsoft Excel XP software packages (MicosoftCorp., USA) and Statistica 6.0 (StatSoft Inc., USA). Results. In our studies, it was found that the total loss of iron in most cases significantly exceeded the intake of iron with food. During the period of active rest, the absorption of iron from food increased. In most cases, his balance was positive. Through the correct selection of foods rich in trace elements, you can try to influence the balance of trace elements in the body. Conclusion. Thus, the complexes we offer to a greater or lesser extent have a positive effect on a number of important indicators, and are recommended for the prevention of anemia and, also, are highly effective and, therefore, very promising products for improving physical performance.