Today it is a well-established fact that scientifically substantiated, competent and individualized usage of macro-, micro- and pharmaconutrients is capable of optimizing human capacities, increasing muscle contraction strength, general and special endurance in professional, highly skilled athletes. It is quite obvious that balanced nutrition is a key to providing athlete body with the main substances and energy necessary for the high level of motor activity. The paper considers the role, the place, the validity and the efficiency of dietary supplements utilization in the course of athlete preparation on the basis of March 2018 the IOC Consensus statement on dietary supplements usage by elite athletes, which has become the main regulatory document for specialists of sports medicine and nutritiology. The Consensus has formulated the concept of ergogenic nutritiological means that in future will enable to revise the system of sports preparation pharmacological support in European countries, bringing it closer to world standards. The work briefly highlights the development of sports nutritiology as a science and practice of its provisions realization in elite sport. Based on the Consensus provisions, 4 main classes of dietary supplements for sport have been outlined: 1) functional food, food enriched with additional nutrients or components, different from the usual nutrient composition; 2) specially formulated compounds and sports nutrition for providing energy and nutrients in a more convenient form than regular food for nutritional support in sport; 3) individual nutrients and other food components or plant products in isolated or concentrated forms; 4) multi-component products containing various combinations of substances with a certain intended use. In addition, the main, more highly specialized groups of dietary supplements have been classified with indication of their representatives, the fundamental differences between dietary supplements and ergogenic pharmacological preparations have been formulated, thus enabling reasonable nutritional and metabolic support of functional and structural reorganizations in the body of athlete, when it forms the prerequisites for emergence of new own ergogenic characteristics. The article emphasizes that the problem of dietary supplements usage has many unresolved issues of organizational and informational nature, focuses on the formation of holistic algorithm for these ergogenic means utilization, which requires highly qualified specialists - sports nutritionists, above all. The authors present their vision of managing preparation of such specialists in the post-Soviet space, which should become the key to the rational use of dietary supplements in order to increase the competitive process efficiency of members of the national Olympic teams along with preservation of athletes` health.
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