The word "gut" is a red flag for pseudoscience. There's no such thing. Talk about specific organs and areas of the digestive system, not a "gut".

Is it though? Or are you overly confident in your knowledge, and being unnecessarily critical to the point of ignorance? And are just spreading misinformation?

Given this is a term used in the journal of Nature, the U.S. National Institute of Health, Universities (ie. Cambridge, Oxford), The American Society for Microbiology (ASM), the EU European Science Commission, the UK National Health System, and is used within countless publications to succinctly describes the "human microbiome" which is largely composed of the microbiome in the digestive tract (otherwise known as the "gut"), you are most definitely wrong.

It's an actual term with a definition, just because you aren't aware of it doesn't mean it doesn't exist...

Is a "digestive tract" also not a thing because it doesn't describe a specific organ? How about the endocrine system? What about your immune system? Your body is made up of systems that interact in complex ways across organs, and often the organs themselves are not the imporibit either.

I would suggest you at least read the Wikipedia page before spouting such nonsense as this.

This is one of the times I wish the downvote button was enabled, this sort of nonsense shouldn't be able to bubble up to the top by virtue of just finding enough people who also don't know better.

The "gut" might not be an organ but I can't see a microbe letting go of some tasty piece of food just because it happens to pass from the small incestine to the colon... (wrong terms can safely be attributed to my translation tool)...