Weight-loss surgery is more effective than diet and exercise as a treatment for obesity, according to a review of health studies involving almost 800 people. Surgery such as gastric banding, gastric bypass or sleeve gastrectomy led to on average 26 kilograms (57 pounds) more weight loss after two years than non-surgical treatment, which included diet, exercise, behavioral therapy and medicines, according to an analysis of 11 studies of 796 obese people. The research was published today in the British Medical Journal.
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