In this book, the authors present current research in the study of the symptoms, treatment and prevention of gastrointestinal disorders. Topics discussed include short bowel syndrome; gastrointestinal disorders in pregnant women; dual topology of the gastric proton pump; epithelial barrier function in inflammatory bowel disease; treatment of laryngopharyngeal symptoms related to gastroesophageal reflux disease by proton pump inhibitors; Crohn’s disease and the therapeutic perspectives of gastrointestinal melatonin.