Liver flukes are red small bugs that may live in the liver. I did not expel any so far. From what I read, they must look like bright orange or bright red tomato skin parts. You may find pictures of those on the web or somewhere on this forum. If you flush your liver
you may expel some of these if you have them.
I had done a parasite
and Bowel Cleanse
in August. I did not expel any worms then. I expelled a roundworm only sometime after I began taking milk thistle (brand, Solgar). I must also say that I've been drinking 1-2 glasses of homemade kefir every morning for the last 4 months, and this roundworm came out right after my bowel movement when I drank my usual morning kefir.
I feel that my bowels have improved a lot since I started drinking kefir in the mornings. I became more regular.
Milk thistle is a great supplement if you think that your liver is weak. I do not know whether it is necessary for the liver flush, but I guess there would be no harm in taking milk thistle for a while before and/or after the flush.
Good luck on your cleansing!