You assume that the Liver Flush produces Gallstones (on no good grounds). On the other hand I have my experience and have referred to numerous papers and could refer to at least as many again. Considering your previous pronouncements on the nature of evidence I am surprised that you claim I am assuming things. Since the destruct testing of the human body is untenable except by such monsters as Josef Mengele, much about the human body is known by observation. Why do you insist on the sort of proof that is impossible ethically? Again it comes down to cosy belief (based on many more assumptions and disbelief of the evidence already available).
You fail to understand the nature of Science IMO. It comes back to Occam's razor again.