Before you is not a textbook for doctors and not an instruction manual for the treatment of all diseases. This book will simply and easily help you understand the principles of digestion and understand what exactly went wrong. The author draws attention to the most frequent errors and practical difficulties that arise on the way from the onset of the disease to recovery. You learn about digestion, if not everything, then a lot. And knowing how the stomach, liver and intestines work, it becomes easier to understand what exactly needs to be done to restore them. Sergey Vyalov is a gastroenterologist with international qualifications and experience in Germany, hepatologist, candidate of medical sciences, medical consultant for the TV programs "On the Most Important," "I Lose Weight," "Test Purchase" and others on federal TV channels (First, Russia, NTV). He has more than 160 scientific articles and more than 20 books for doctors.