Your microbes and you: the good, bad and ugly

Microscopic creatures—including bacteria, fungi and viruses—can make you ill. But what you may not realize is that trillions of microbes are living in and on your body right now.

Most don’t harm you at all. In fact, they help you digest food, protect against infection and even maintain your reproductive health.

We tend to focus on destroying bad microbes. But taking care of good ones may be even more important.

You might be surprised to learn that your microbes actually outnumber your own cells by 10 to 1.