Weight-loss devices: How they work
Weight-loss devices—including gastric balloons, a vagus nerve stimulator, and an external stomach pump—may help people eat or absorb less food. They may appeal to people who don’t want to undergo weight-loss surgery, which involves a permanent change to the gastrointestinal tract. But the devices don’t come close to providing the same weight-loss benefits, and their long-term effectiveness and safety remains unknown.
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