The manual presents and systematizes modern information on all areas of biochemistry. The basic principles of static, dynamic and fundamental biochemistry are considered. The characteristics of the metabolism of proteins, carbohydrates, lipids, and nucleic acids in normal conditions and in some pathological conditions are given. The features of metabolism in various organs and tissues are characterized. Modern ideas about the molecular basis of disorders in a number of pathological conditions and diseases are outlined. Intended for medical students, biologists, and doctors.