Many of us have learned to “trust our gut.” But if we ask most people what our digestive tract is for, they’ll probably explain it as a way of absorbing nutrients and disposing of waste. So where do phrases such as “trusting our gut” or “unable to stomach the results” come from? It turns out there is a two-way street between our digestive organs and our brains. What we eat and the state of our digestive tract can have a profound impact on our moods and behaviors. And probably unsurprisingly at this point, our gut microbiome is also involved.

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