Bariatric surgery is an elective weight loss surgery to manage severe obesity and for the candidates who have not been able to lose enough weight to improve their health using other methods or have serious obesity-related health problems. Bariatric surgery can improve many health problems related to excessive weight or obesity, such as type 2 diabetes, high blood pressure, unhealthy cholesterol levels and sleep apnea. The weight loss surgery can be very helpful to improve physical function and mood, and to have a better quality of life.