Yes it is a jungle. The easiest thing is to see what people have used here and read up on it.
There are fiber cleanses P&B shakes, info top of page on FAQ. Colonix http://www.drnatura.com , there are more like blessed herbs, but you have to check that out yourself, I can't remember them all. Probably other people will react.
Then there oxygen based cleanses like colosan (google) and OxypowderOxypowder .com">http:// Oxypowder .com
You still have to make up your own mind, but it least you will know what has worked for people.