A common weight loss surgery may lead to long-term gastrointestinal problems and food intolerance.
Researchers examined data on about 250 extremely obese patients who had what's known as laparoscopic gastric bypass. It reduces the stomach to about the size of an egg.
Two years after surgery, these patients had lost about 31 percent of their total body weight on average. But compared to the group that didn't didn't have the procedure, the gastric bypass patients were far more likely to experience indigestion and an inability to tolerate multiple foods.
Although many of those foods were ones patients were told to avoid after surgery. The study was published in the British Journal of Surgery.