I think Charlie is right that the liver flushes don't give the liver any building blocks to make repairs and get stronger. Liver flushes help de-congest the liver of debris. I have done nearly 35 liver flushes and they have made a difference in my health. But, I recognize that my liver still needs help. I believe Charlie's tonic helps re-build the liver so it is stronger and can do its functions more easily/efficiently, etc.
I think each person needs to access where they are at health-wise and determine the best path to take. I also believe prayer/God's guidance helps and listening to your own body helps. Piz is getting great results with Charlie's tonic, so her liver needed the building blocks at this time.