I am tasked with designing an in vivo experiment in humans that requires manipulating the gut flora in one sample group to gauge its effect. Please suggest ways of doing this besides administering antibiotics.*

*I am of the view that antibiotics may have unintended consequences and may be unethical; explain any opposing view.

Thanks.

I am tasked with designing an in vivo experiment in humans that requires manipulating the gut flora in one sample group to gauge its effect. Please suggest ways of doing this besides administering antibiotics.

I am of the view that antibiotics may have unintended consequences and may be unethical; explain any opposing view.