Obesity’s weight gain message starts in gut
Microbe-made molecule tells brain to boost insulin, hunger hormone
![rat eating](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/06/060816_ti_obesity-main_free.jpg?fit=860%2C460&ssl=1)
GUT REACTION Research on rats and mice suggests that gut bacteria start the cycle of obesity. The bacteria make a molecule called acetate that sends signals through the vagus nerve to stimulate hunger and fat storage.
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