A new implantable weight loss device is leading to dramatic results in animal testing. Rats implanted with the device lost nearly 40-percent of their body weight in about three months. Two University of Wisconsin scientists developed the battery-free device that's less than half an inch long. It stimulates a nerve linking the brain and the stomach and tricks the brain into thinking the stomach is full after a small amount of food is eaten. A report on the study and the device is published in this month's edition of the journal Nature.
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