Benefits

• For a person who is 100 pounds overweight and suffering from dangerous illnesses such as type 2 diabetes, a gastric bypass can be a serious option.
  
  

Complications

• If the band and staples that close part of the pouch break away, or if there is a leak in the stomach pouch, the patient can be at risk.
  
  

Other complications

• This surgery could result in further complications such as bleeding, blood clots, bowel problems, gallstones and blood infection.
  
  

Nutritional Deficiency

• A person who undergoes a gastric bypass will require nutritional supplements all his life. If he has a nutritional deficiency, he can become anemic or have osteoporosis from a low intake of iron and calcium.
  
  

Dumping Syndrome

• A patient who has undergone a gastric bypass will experience a "dumping syndrome" when food passes down the intestines quickly, causing diarrhea, weakness, nausea and cold sweat.