Gastric bypass – also called Roux –en- Y gastric bypass are divided into two parts: 1) surgeon will create a small pouch in the upper section of the stomach which will make stomach much smaller in size. This way patient will eat less and feel satiated sooner. 2) Surgeon will cut the small intestine and attaches the lower part directly to the stomach pouch. Food will bypasses most part of the stomach and the upper part of small intestine so the body will absorb fewer calories. The surgeon will connect the bypassed part farther down to the lower part of the small intestine while the main part of the stomach will continue to make digestive juices. The bypass can also change gut hormones, bacteria, and suppress hunger by keeping satiated. This surgery is difficult to reverse. Some of the advantages of gastric bypass surgery are as follows:
a) Significant weight loss for longer period
b) Limits the amount food consumed
c) Conditions that increase energy consumed
d) Maintenance of excess weight loss
e) Makes person feel satiated and fuller
Apart from few advantages, gastric bypass surgery is more complex operation and can result in further complications. This also requires a restricted diet along with lifelong intake of vitamins and mineral supplements as gastric surgery can lead to long term vitamins/mineral deficiencies especially B12, folate, calcium and iron.