Unfortunately, it is impossible to "flush" the liver. I recently took one of Hulda Clark 's "recipes" to my Primary Care Physician for his professional opinion. He read it, laughed heartily, handed it back to me and said "That's hogwash, and you can tell them your doc said so".
The various "recipes" and "products" offered on the Internet in this regard are designed to seperate the desperate from their money, not offer anything of therapuetic value. I only hope that these treatments are benign, and do not cause more harm than the condition folks are trying to cope with.
I suggest you try Quackwatch.com, and type in the key search words " Hulda Clark " It will be an eye opening experience for you.