Nutritional recommendations after mixed procedures

Roux-n-Y gastric bypass was considered the gold standard of bariatric surgery for a long time. It is one of the eldest bariatric procedure that continues to be performed. Specific characteristics of the design of this surgery are a small pouch and a moderate or significant malabsorption. The gastrojejunal anastomosis may lead to the appearance of dumping, and distal bypasses may lead to malnutrition. These characteristics are essential in the design of the nutritional reccommendations for operated patients. Recommendations vary from early postoperative time to long-term follow-up. Some food intolerances due to small pouches need to be also considered. This chapter reviews the nutritional recommendations for gastric bypass patients from early stages to long-term follow-up, and management of potential complications.