Combined surgeries, such as Roux-en-Y gastric bypass, long limb Roux-en-Y gastric bypass with  malabsorptive and restrictive methods.  The procedure restricts how much the stomach can hold while reducing how much it can absorb, however, it does so to a smaller extent than procedures which are exclusively malabsorptive.  The combination of these two types of procedures has proven to be a great formula for long term weight loss.  Combined procedures are the most commonly performed weight loss surgeries today, making up approximately 90% of all gastric bypass surgeries in the United States.