The human body is a complex system in which there is nothing superfluous. Ideally, it should work like a Swiss watch. Each organ has its own function, but they all interact with each other, and problems in one can lead to malfunctions in others. The book is dedicated to the organs of the digestive system, their proper functioning and healthy eating. The author gives recommendations for the prevention and treatment of a number of diseases, cites the beneficial properties of a number of products and notes the harm that others can cause, because it is thanks to the food consumed that the human body receives the energy necessary for life. The book contains many interesting facts and recommendations for anyone who wants to stay healthy for a long time.