1. i'm not sure how to use the Bentonite clay since i have never tried it. hopefully someone with experience with this will post a message for ya.
2. probiotics are acidophilus pills. they are "good bacteria" in a pill. when you take anti-biotics or are very sick for an extended period of time, etc. you upset the balance of good bacteria and bad bacteria so it's a good idea to take acidophilus pills to restore balance to you body's natural flora.
3. my tummy got larger after i did the Clarkiaparasite cleanse. as for the other cleanses, i'm not sure as i really haven't gotten that far yet. i heard the Bowel Cleanse and Liver Flush and also using castor oil packs on tummy help with protruding abdomens somewhat.