Some people go to extreme lengths to implant beneficial flora into their gut... with, I kid you not, POO TRANSPLANTS (https://en.wikipedia.org/wiki/Fecal_bacteriotherapy).
Seems like it's mostly done for medical reasons at the moment, but I could easily see this becoming a fad craze.
You can actually buy poo tablets, and become a poo donor. http://www.openbiome.org/