Gut metabolism changes -- not stomach size -- linked to success of vertical sleeve gastrectomy

It's not the size of the stomach that causes weight loss after a specific type of bariatric surgery, but rather a change in the gut metabolism, say researchers. They have found that following vertical sleeve gastrectomy, there is a change in bile acids that bind to a nuclear receptor called FXR. In the absence of FXR, the researchers showed, weight-loss success and improvement in diabetes from vertical sleeve gastrectomy is reduced.

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