f-165 zapping and the good flora

with the power behind the f165, shouldt we be concerned about zapping and killing good flora? especially hearing N say one can run periodontal frequencies w/footpads and feel it in ones teeth.. jeeze, wonder what that could be doing to our good flora, especially for those without appendix. obviously its the freqs probably doing most of the killing but pretty sure current is supposed to non selectively kill as well, and if its reaching the teeth and gums then...

is it even neccasary to zap with power on or close to max?

anybody notice serious bowel changes after using it as contact?