This volume provides readers with the necessary information to select the most appropriate nutritional support following gastrointestinal tract surgery.Most patients are worried about resuming oral intake, particularly when the surgery  has altered the  GI tract normal physiology removing organs (e.g. total colectomy) or part of them, or modifying the natural sequence of the different GI tract parts (e.g. after esophagectomy or pancreatectomy). Patients may also worry about the possible complications of an inappropriate alimentation. As a matter of fact, several metabolic processes can be modified by GI tract surgery (e.g. major liver resection or pancreatectomy),  thus making the nutritional support  essential:  and the same support is fundamental in  bariatric surgery, nowadays  widely used for super-obese patients.