Exercise and diet alone usually fail to effectively treat individuals with extreme and excessive fat. bariatric surgery enters the scene then, commonly said as weight loss surgery is one in every of the burden loss treatments with the Long history of success and clinical studies to validate its effectiveness. The bariatric surgery is often outlined as surgery on the abdomen or intestines to change or interrupt this digestion method so food isn’t counteracted and absorbed within the usual method this helps in reducing weight as a result of reduction within the quantity of nutrients and calories absorbed, decrease their risk for obesity-related health risks or disorders. The Principles behind bariatric surgery is to reduce the food intake which in turn reduces the absorption of food within the abdomen and intestines.The digestion method begins within the mouth wherever food is chewed and mixed with secretion. The food then reaches the abdomen where it’s mixed with organic juices and counteracted so nutrients and calories are absorbed. Digestion then becomes quicker as food moves into the small intestine (first a part of the tiny intestine) wherever it’s mixed with gall and digestive fluid. , bariatric surgery may lower death rates for patients with severe fat, particularly when accompanied with healthy eating and proper exercise.