And one of the reasons that it might be so powerful is the fact that we have a particular bug in our microbiomes that is only activated by coffee: prevotella abundance. That bacteria, Dr Amati explains, “is linked to several changes, including increased diversity and abundance of good bacteria”.

Interestingly, it’s activated whether you drink caffeinated or decaf coffee – so if you’re someone who avoids the black stuff for fear of an uncontrolled caffeine buzz or have tried to cut down on caffeine, you can still reap the huge health benefits.

Previous Zoe research has found coffee drinkers tended to have higher microbiome diversity than non-coffee drinkers. They’ve also concluded that the gut benefits are also dose-dependent, meaning the more coffee your drink, the more diverse your microbiome.

Decaf coffee is just as good for your gut as the caffeinated stuff – here's why