The gut microbiome is made up of billions of bacteria, and scientists have been trying to understand exactly how they affect our health, contribute to our risk of contacting diseases and how they interact with the vital organs and systems in the body, including the brain. It is quite a lot to unpick.
While there’s no clear answer yet of what a healthy gut microbiome looks like, it’s widely accepted that environmental factors, such as diet, can alter it. But one emerging theory is that air pollution is also one of these factors, and it can play a part in triggering debilitating diseases – bad news for our guts, since air quality has been deteriorating in cities around the world.
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