While weight-loss surgery can help obese people drop unwanted pounds, a new study suggests the procedure may also trigger long-lasting tummy troubles for many patients.

Dutch researchers found that people who had the most common type of weight-loss surgery, known as laparoscopic Roux-en-Y gastric bypass, suffered gastrointestinal problems and food intolerance up to two years after their operation.

The procedure entails stapling the stomach and re-routing the intestines, so that food that is consumed bypasses most of the stomach and caloric consumption is reduced.

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