It has not been used a lot in the last 4 years by people. If I remember right it is a fast and it is expensive.
If you don't get an answer here,type HH, in the search box and check on All Forums.
Most of the answers would be on the Colon Cleanse forum.
There was one person several years ago who tried several different cleanses and I think she did this one too, her name is Zule.