Research suggests certain bacteria in your gut can prevent and treat many common diseases.
In many ways, your gut bacteria are as vast and mysterious as the Milky Way. About 100 trillion bacteria, both good and bad, live inside your digestive system. Collectively, they're known as the gut microbiota.
Science has begun to look more closely at how this enormous system of organisms influences—and even improves—health conditions, from heart disease to arthritis to cancer. But understanding how the gut microbiota works, and how you may benefit, can be daunting.
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