Bariatric surgery is the surgical procedure to treat obesity. It is a boon for people who are unable to lose weight due to medical problems, despite dieting and exercising. Research suggests that bariatric surgery has reduced the death rate of patients with severe obesity. Bariatric surgery restricts the size of the stomach by removing a portion of the stomach, or by placing a band around the stomach. The main objective of bariatric surgery is to reduce the intake of food, which in-turn leads to weight loss.