New research suggests that people with diabetes may be less likely to lose weight after undergoing gastric bypass surgery.
The procedure is a form of obesity surgery
and involves creating a small stomach pouch that restricts the amount of food eaten and bypasses part of the digestive system so that less is absorbed.
It is capable of achieving significant levels of weight loss in people who have failed to lose weight through diet and exercise, but new research suggests that not everyone is likely to benefit.
A study published in the latest issue of the Archives of Surgery suggests that individuals with diabetes and those with large stomach pouches are less likely to lose weight after obesity surgery.
Researchers at the University of California, San Francisco, examined data from 361 patients who underwent gastric bypass surgery between 2003 and 2006.
Thirty-eight of the patients had poor weight loss after the procedure and the researchers found that having diabetes or having a large stomach pouch after gastric bypass surgery reduced the likelihood of significant weight loss.
They wrote: "We conclude that gastric bypass provides good or excellent weight loss for most patients.
"However, diabetes mellitus and larger pouch size are independently associated with poor weight loss after gastric bypass."