I have done 2 Liver Flushes & passed lots of green coloured Gall Stones about the size of peas and other stuff that looked like yellow rice (which I later found out were possibly tape worm eggs). I'm half way through my 3rd liver flush, having finished the Humaworm course last week. During the Humaworm course, even though I had some bad tummy bouts, I wasn't aware of passing anything out of the ordinary so dont expect any terrible frights! (although, of course, I'm sure everyones experiences are different) Hope that helps.