That was put up by Curezone--I totally disagree and so does Andrew Weil, Harvard M.D. Joel Fuhrman, M.D. Bragg, and many more. In fact Weil says it may actually stress the liver, loading it with fat like that.
I've studied the liver a lot because I have HEP C. I wish it wasn't there. It's one opinion, it's not science. The Science is on the side of Weil and Fuhrman I think.
If you're convinced you do need it, and I know many on here do it and claim benefit, definately don't do it during fasting.
I've given in myself at a certain period in my life, didn't experience any benefit, and don't practice it. There is just no good Science I know behind it.