You might not know of Andreas Moritz but some of us follow him. You can read about him on his website http://www.ener-chi.com
I am the opposite of you if I can stay away from herbs I do, because I have a few bad experiences. The Oxypowder only takes 7-10 days.
Here is a link about colon health, read the whole threads in case there are different views on it. //www.curezone.org/forums/m.asp?f=337&i=12699