The presented book Diseases of the esophagus, ulcer disease of the stomach and duodenum is intended for a wide group of patients who suffer from diseases of the stomach, esophagus or duodenum. The authors aim for patients to find answers to their questions about their health status, regimen measures or diet and treatment that should help them. Measures can be temporary or permanent, diet or treatment can be used both long-term in some patients, and temporarily in patients with acute gastroenteritis or duodenal ulcer. Heartburn and reflux disease respond well to a combination of diet, regimen measures, and appropriate medications that suppress the production of stomach acid. The booklet contains recipes for suitable foods, that is, those that do not support the formation of hydrochloric acid in the stomach, or are capable of neutralizing it.