Bariatric surgical methodology cause weight reduction by confining the measure of sustenance the stomach can hold, causing malabsorption of supplements, or by a mix of both gastric limitation and malabsorption. Bariatric techniques likewise frequently cause hormonal changes. Most weight reduction surgeries today are performed utilizing insignificantly obtrusive methods (laparoscopic surgery). The essential rule of bariatric surgery is to confine nourishment admission and decline the ingestion of sustenance in the stomach and digestion tracts. The absorption procedure starts in the mouth where sustenance is bitten and blended with salivation and other chemical containing emissions. The nourishment at that point achieves the stomach where it is blended with stomach related squeezes and separated so supplements and calories can be retained. Absorption at that point turns out to be speedier as nourishment moves into the duodenum (initial segment of the small digestive system) where it is blended with bile and pancreatic juice. Bariatric surgery is intended to modify or interfere with this absorption procedure so nourishment isn't separated and assimilated in the typical way. A diminishment in the measure of supplements and calories consumed empowers patients to shed pounds and lessening their hazard for weight related wellbeing dangers or scatters. The most widely recognized bariatric surgery methods are gastric sidestep, sleeve gastrectomy, movable gastric band, and biliopancreatic preoccupation with duodenal switch.