Type “gut health” in your search browser and you will find millions of popular web entries that tell you to take charge of your gut and eat specific foods to improve its condition.

First came probiotics. Then whole grains. Next, grocery stores started to devote whole display cases to kombucha. And now we are rediscovering the taste of other fermented foods.

So what is gut health and how can we support it?

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Photo by Matthew Modoono/Northeastern University