Bariatric surgery is a procedure to assist obese individuals lose weight. It is carried out by Bariatric surgeons in local hospitals. A Bariatric surgeon determines if the patient qualifies for weight loss surgery, the doctor performs the surgery. People who unable to lose weight with exercise and diet are supposed to consider this surgery. The most type of this surgery in the US is gastric bypass. This surgery is a major operation which can cause significant side effects, including blood clots, vitamin deficiencies and infections which may be life threatening.