70-70% EWL. The average pt loses 70-75% of the weight that they are overweight in 12-18 months. -dr c evanson md fasc fasmbs carmel, in.
100% There is no data to show the success rate of a gastric bypass. However if done by a well trained bariatric surgeon who rule out hiatal hernia and emotional eating this procedure can be 100% successful. Research you surgeon well and good luck.