There was one interesting case of a faecal transplant patient whose Parkinson’s went into remission post transplant. It’s a single case, so isn’t of much significance by itself, but does suggest possible research paths.
Like when you get a craving for salted food for a day or two or sugar, be it cakes or fresh fruit. I currently have yearning for home made fresh coleslaw. Yum
Every choice we make generates a corresponding timeline of experience. Is the resulting narrative a limit or a creative guideline? No wrong answer - only another choice.