What's really going on in your gut?

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The gut is home to trillions of microorganisms, including bacteria, viruses and fungi. What are they doing down there?

Professor of Biomolecular Medicine Jon Swann explores the relationship between your gut and your brain, and how the gut influences your health, your mood - and potentially even the way you think.

• Made by BBC Ideas in partnership with UKRI

• Find out more about UKRI research into health, external

Film by Damn Fine Media

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• Published13 minutes ago