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You're listening to Life Kit from NPR.

Hey everybody, it's Mariel.

Have you ever seen the kids TV show The Magic School Bus?

I was a big fan.

The show's main character, the schoolteacher and fashion icon, Miss Frizzle, would take her students on adventures in a magic school bus.

Sometimes they'd end up in the human body. They'd pile into the bus, shrink down until they were

very little, drive up somebody's nose or down their gullet, and observe the wilds of the human body

up close and personal. If we could all hop on that bus together and take a trip to the human gut, we would see

trillions of microbes at work.

Here's NPR health correspondent Maria Godoy.

They break down food that our bodies can't digest, and as a result of that breakdown process,

they produce chemical messengers that influence our health. And we're talking

everything from, you know, blood sugar levels to mental health. Some of these chemical messengers

can boost health, but others can hinder it. It all depends on what you're feeding your gut

microbes. A recent study in the journal Nature Microbiology found that we should be feeding

them lots of different kinds of plants in large quantities.

And that's true whether or not you eat meat and other animal products.

On this episode of Life Kit, Maria and I talk about the research, why the diversity of plants

we eat matters, and how we can all mix up our diets.

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