Gastric bypass, also called Roux-en-Y, may help improve weight-related complications like diabetes. During gastric bypass surgery, a one-half to one-ounce pouch about the size of an egg is made from the stomach and connected to the rest of the gastrointestinal tract, changing the pathway of the small intestine.


  • Surgery 1-1.5 hours
  • 2-3 day hospital stay
  • 2-6 weeks recovery period


  • Fastest / greater weight loss on average, with 60-80% of expected weight lost 18-24 months after surgery
  • More successful at helping patients improve weight-related conditions like diabetes


  • Leakage through staples or sutures that hold stomach and intestine together
  • Injury to spleen during surgery
  • Ulcers develop in the stomach or small intestine
  • Blockage of stomach opening
  • Internal hernias
  • Vitamin and iron deficiency

Other Considerations

  • Not reversible
  • Fastest weight loss
  • Nausea and dumping syndrome with certain foods (large amounts of sugar may cause diarrhea and sweating
  • Vitamins mandatory
  • Not allowed to take aspirin
  • Able to eat regular food after 2 weeks of surgery
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