Avoiding processed food, like that high in sugars. Having probiotics and probiotics, which is things like yoghurts and fermented foods like kimchi, kombucha and sauerkraut.

Happy guts also like exercise to help move things along and most people have too little fibre from fruits vegetables and nuts. So increase fibre and get your 7 a day.

Alcohol is a general irritant and should be limited or avoided. For more complex answers, look into FODMAPs as well, which can be a problem for some people.

So, overall, less stodgy complex carbs, more fresh fruit and veg. Mostly the same as what is better for heart health, but with added probiotics!