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After weight-loss surgery, new gut bacteria keep obesity away
Yahoo! News

The logic behind weight-loss surgery seems simple: rearrange the digestive tract so the stomach can hold less food and the food bypasses part of the small intestine, allowing fewer of a meal’s calories to be absorbed. Bye-bye, obesity. A study of lab mice, published on Wednesday, begs to differ. It concludes that one of the most common and effective forms of bariatric surgery, called Roux-en-Y gastric bypass, melts away pounds not – or not only – by re-routing the digestive tract, as long thought, but by changing the bacteria in the gut.

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