You really need to watch it. I had no idea the gut and microorganism that live there (bacteria,etc.) had so much to do with our overall health. Really, what we eat, and it’s important to eat a diversely and why. They can change for the better or worse.
One interesting tidbit is cravings. We all think it’s in our heads. It’s not. It’s the microbiomes. They get used to digesting say “sugar”, and want to keep digesting that. Thats when we have willpower and notice our cravings are gone, its nit our minds having power. It’s the bacteria and virus have changed and seek other nutrients.