I didn't think of this until later....I got horribly sick when I did the liver flushes prior to knowing to kill the parasites. Enough that it's scared my husband off from ever wanting to attempt a liver flush. And not just violently sick once, but twice. Thinking back on it, I'm surprised myself that I gave it another try, because it was really bad. And definetly not meaning to scare anyone off from liver flushing- but it is another good example of why Doc says to do things "in order" and be killing the parasites two weeks prior to liver flushing.