Weight loss surgery or Bariatric surgery is boon for obese patients who are failed to reduce excess body weight. Many times physical exercises and diet are ineffective to reduce desire body weight. Bariatric surgery is the most effective option for obese people who have a body mass index (BMI) above 40. There are two basic types of weight loss surgeries such as Restrictive surgeries and Malabsorptive / Restrictive surgeries. Restrictive surgeries work by physically restricting the size of the stomach and slowing down digestion while Malabsorptive or Restrictive surgeries are more invasive surgical procedure. Malabsorptive surgery not only works to restricting the size of the stomach but also physically removes parts of the digestive tract thus reducing absorption of calories. Types of Weight Loss Surgery procedures are: • Biliopancreatic diversion with duodenal switch (BPD/DS) • ...