Dr. Crislip hints at a truly useful pro-biotics regimen.
I refrain from stating it directly, cause the filters might not like it.
Around the corner -- Pro-biotics attempts to help populate the bowels with new fauna. The best way to repopulate that fauna is to steal some from your nearest and dearest and place it in your own bowel, by way of your stomach.
Even taking the long way to describe it make my stomach flutter.
As a biologist (sort of, long ago) most gut inhabitants are bacteria, which are neither plant nor animal, so fauna is as good as flora, although protista would be better (apart from no-one understanding what you were on about).