Researchers have developed and are testing a small, implanted gastric balloon that people can inflate or deflate to feel full or not.

Gastric balloons—silicone balloons filled with air or saline and placed in the stomach—can help people lose weight by making them feel too full to overeat. However, this effect can eventually wear off as the stomach becomes used to the sensation of fullness.

Gastric balloons — silicone balloons filled with air or saline and placed in the stomach — can help people lose weight by making them feel too full to overeat. However, this effect eventua

Invasive weight-loss surgeries can often be a tough sell, too. Now, researchers at the Massachusetts Institute of Technology (MIT) say they've developed an alternative: A small, implanted gastric balloon that people can inflate or deflate to feel full or not.