Micro-nutritional Status and Gut Microbiota in Morbidly Obese Patients Before and After Gastric Bypass

An intervention study design in 90 obese patients will be used. Nutritional, metabolic and psychological status as well as gut microbiota will be evaluated before gastric bypass and 6 months post surgery. During this period of 6 months, all patients will receive a specific diet according to recommendation with regard to bariatric surgery. Subjects will be than randomized in 2 sub-groups: A. patients receiving a standard healthy diet without micro-nutriments' supplementation; B. patients receiving a healthy diet and probiotics, minerals, aminoacids, omega-3 acids vitamin and mineral supplementation