The reference book systematizes and describes in detail vitamins, micro- and macronutrients - substances that are extremely necessary for the normal functioning of all organs, tissues and systems, for the effective course of metabolic processes in the human body. Methods of their use are described in detail, both by a healthy person and in the occurrence of diseases. For general practitioners, district and family doctors, medical students. It is of considerable interest to doctors of other specialties, as well as to the widest range of readers.