Sleeve gastrectomy, also called gastric sleeve surgery, is the most commonly performed weight-loss operation in the world. It permanently removes about 75–85% of the stomach to create a narrow, banana-shaped "sleeve" that limits food intake and reduces hunger hormones, producing durable weight loss and lasting improvement in diabetes, high blood pressure, sleep apnea, and other obesity-related conditions.

Roux-en-Y gastric bypass (RYGB) is a proven weight-loss and metabolic surgery that reduces stomach size and reroutes the small intestine, producing durable weight loss and strong improvement in type 2 diabetes, high blood pressure, and reflux.

The duodenal switch (biliopancreatic diversion with duodenal switch, or BPD/DS) is the most powerful standard weight-loss operation, combining a sleeve gastrectomy with an intestinal bypass to produce the greatest and most durable long-term weight loss and the highest rates of diabetes remission.

SADI-S is a powerful, simplified single-anastomosis version of the duodenal switch that combines a sleeve gastrectomy with one intestinal bypass. It delivers greater weight loss and higher diabetes remission than gastric bypass, with fewer anastomoses and a lower technical complication risk than the traditional duodenal switch.

Revision bariatric surgery corrects, converts, or reverses a previous weight-loss operation when it has caused complications, stopped controlling weight, or triggered problems like reflux. It restores results and resolves symptoms for patients whose first surgery no longer meets their needs.