Prof. Zdeněk Zadák, M.D., Ph.D., is Head of the Research and Development Centre of the Faculty of Medicine of Charles University in Hradec Králové and the University Hospital in Hradec Králové, a past Head of the Department of Gerontology and Metabolism at the University Hospital in Hradec Králové, a past Chairman of the the Czech Society for Parenteral and Enteral Nutrition (CSPEN), and a past elected member of the committee of the European Society for Parenteral and Enteral Nutrition. Prof. Zadák is a member of the committee of the Czech Pathophysiological Society, the Czech Society of Internal Medicine of the Czech Medical Association of J. E. Purkyně, and the Czech Atherosclerosis Society; the editorial boards of multiple domestic and foreign professional periodicals (e.g. Clinical Nutrition London, Clinical Biochemistry and Metabolism, Geriatrics, Diabetes, Metabolism and Clinical Nutrition, Polish Journal of Human Nutrition and Metabolism Warsaw, and others); a number of committees related to the discipline, including the Grant Committee for Metabolism and Nutrition IGA; the working group of the Scientific Council of the Ministry of Health of the Czech Republic; and the Accreditation Commission for Internal Medicine and Intensive Care Medicine. Prof. Zadák's experience includes numerous international residencies, repeated work at the Royal University Hospital in Liverpool, and authorship or co-authorship of more than two hundred publications.