It is a surgery that reduces the size of the stomach and makes a narrow tube. The new stomach it is much smaller and produces less of the hormone (ghrelin) that causes hunger, helping you feel satisfied with less food.
Gastric sleeve is safer than gastric bypass because the intestines are not reorganized, and there is less chance of malnutrition, with better control than the lap bands. This procedure safer than bands, since no extraneous materials are used.
The sleeve gastrectomy has a good success rate, and the patient loses an average of 33 percent of their excess weight in the first year. For a person who is 120 pounds overweight, this would mean losing about 40 pounds in the first year.