The most common type of weight-loss surgery, gastric bypass, can be more effective than medication, diet and exercise in treating diabetes in those with mild to moderate obesity, according to a yearlong study published in the Journal of the American Medical Association. The study followed 120 patients, 60 of whom had surgery. The surgery group lost an average of 60 pounds, and 75% achieved blood-sugar levels considered normal or near-normal, while the nonsurgery group lost an average of 17 pounds, and 30% of the group members hit blood-sugar targets. Researchers warn that the potential for serious complications must be considered.

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