Background and Aims: Bariatric surgery is one of the efficient methods for losing weight in morbidly obese cases and it is associated with a risk of presenting some complications following bariatric surgery which depend on nutritional deficiencies. The main aim of this survey was to investigate the prevalence of preoperative and postoperative micronutrient deficiencies after bariatric surgery in the literatures. Methods: This is a review article that we collected all related articles published recently on bariatric surgery patients that experienced nutritional deficiency. Results: Preoperative monitoring of a combination of several nutritional deficits could be used to identify patients at risk and prevent the onset of deficiency and its consequences after bariatric surgery. Identification and correction of micronutrients deficiencies is essential for treating postoperative complications. Conclusions: To sum up, it is necessary to monitor nutrient status in bariatric surgery patients, which those deficiencies are easily preventable and treatable with proper supplementation and supervised interventions.

Weight gain is a frequent postoperative complication following a solid organ transplant which can be solved by bariatric surgery. The outcomes of bariatric surgery among patients with an organ transplant history are always a challengeable subject for surgeons and surgery candidates. In this review article, we aim to investigate the existence literature about the rates of morbidity and mortality, frequent complications in terms of graft function, remission in diabetes, hypertension, pulmonary and cardiovascular disorders, hepatic and renal functions, and immunosuppressive stability, as well as the safety of bariatric surgery among patients.