Gastro-esophageal Reflux Disease (GERD) : in 25-30%, can be silent without symptoms, and newer international guidelines suggest the need for routine upper endoscopy after LSG to prevent and detect potential significant consequences of GERD.
Weight regain or inadequate weight loss : The rate of reaching > 50% of the excess weight loss (EWL) in this procedure is better than that of the band, and can be equal to the gastric bypass, in some patients, however, over the long run, some (25-30%) experience significant weight regain or not losing 50% EWL.
Vitamin and mineral deficiencies : all patients require long-term supplements and annual nutritional work up, as patients are at the same risk of deficiencies almost similar to gastric bypass patients.