The most popular kind of bariatric surgery, it tries to decrease nutrition absorption by limiting food consumption. The operation, which is usually permanent, entails the removal of a sizable part of your stomach. The smaller piece, which is still present, is about the size of a walnut. The surviving end of the small intestine is attached to the minuscule amount of the stomach that is left after a little portion of it is likewise removed. When a large percentage of the stomach and certain parts of the small intestine are bypassed when you eat, this helps to reduce the patient's appetite.

As the name implies, this surgical technique includes removing about 80% of the stomach to create a pouch that resembles a long sleeve. This drastically decreases the capacity of the stomach and the production of the hormone that controls hunger, ghrelin, which in turn lessens your appetite. It doesn't entail rerouting the intestines like the Roux-en-Y gastric bypass does.

There are two steps to the surgical operation. Making a pouch that resembles a sleeve and attaching it to the end of the intestines, close to the duodenum, is the first phase of the procedure, which is somewhat similar to a sleeve gastrectomy. Bypassing a significant portion of the gut, this aids in limiting nutritional absorption.

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