Types of weight-loss surgeries include restrictive surgeries and malabsorptive/restrictive surgeries, according to WebMD. Both types involve reducing the size of the stomach. Implanting an electrical device is another weight-loss surgery option.
Restrictive surgeries work by slowing down digestion and shrinking the size of the stomach. With a smaller stomach, people tend to eat less, thus speeding up the weight loss process. In malabsorptive/restrictive surgeries, the bypass section of the digestive tract is removed, and the size of the stomach is reduced, which makes it challenging for the body to absorb calories, explains WebMD.
The most recent type of weight-loss surgery is implanting an electrical device. It interrupts nerve signals between the brain and the stomach, encouraging weight loss, notes WebMD.