“Everyone is aware that normal and healthy food is food with appetite, any other food, food by order, by calculation is already recognized to a greater or lesser extent as evil,” wrote academician I. P. Pavlov. This is an unusual book. . Its main feature is that the stomach, its diseases, as well as their prevention and treatment are considered in the “context” of the whole organism, in close connection with a person’s lifestyle and thoughts. The author draws the readers’ attention to many “little things” that we usually we don’t attach any importance, we don’t notice their influence on the state of the gastrointestinal tract and health in general. The book is not a dry story about diseases, but a fascinating journey into the world called “the human body.” For a wide range of readers.