The book presents information about the properties of the most studied chemical elements and their application in industry, agriculture, medicine, pharmacy. Described their physiological role, environmental significance, prevalence in the biosphere. The material is presented in a user-friendly structured form, facilitating the assimilation of the material. The book is intended for teachers and students of medical and pharmaceutical universities , and will also be useful to doctors of all specialties , , Research Fellows , PhD students and candidates of academic degrees in medicine , Biology , Chemistry and Ecology , Sports Medicine Specialists , Physical Culture , Environmental Organizations and Institutions .