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Gut health isn't just about fibre: Foods and habits that quietly shape your digestion

Photo: Michael Walk

Search "gut health" and you'll get:

Eat fibre, probiotics, and more fibre.

They are of course important. And it's also been proven diet has a direct and measurable impact on the gut microbiome.

Human research shows dietary patterns shift gut microbial composition and activity within just a few days.

So, your gut is constantly responding to what you do day to day.

But what gets missed is how many of those inputs sit outside the usual "gut health foods" conversation.

People can go weeks trying to fix their digestion, yet these signals are completely off their radar:

Polyphenol-rich foods

Polyphenols are often grouped under "antioxidants", which doesn't say much about what they actually do in the body.

In the gut, polyphenols interact directly with microbial communities. They influence which bacteria thrives and how active they are. At the same time, gut bacteria transforms polyphenols into a range of bioactive compounds which then circulate and work through the body.

Human studies show this 2-way relationship clearly, with polyphenols shaping microbiota composition and microbial metabolism.

This creates a steady layer of signalling that goes far beyond basic digestion.

10 foods richest in polyphenols (in descending order):

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