For some reason there is no 'reply to this message' button for me to reply to anyone's messages! (hmmmm...maybe this is a sign. ha.) Anyway...so I have to start a new post in order to communicate with anybody (strange).
So, Petra...I really don't think that Bentonite would be the culprit. I'm sure it doesn't steal calcium. BUT, PTree will have to answer that question. Here is a good page on Bentonite and it's actions and properties:
If you are worried about the bentonite, still...you might want to keep up with the psyllium anyway! The Bentonite sucks up the toxins...but it's the psyllium that pulls out the mucoid plaque. PTree has done Bowel Cleanses that don't involve bentonite and she still gets out the mucoid plaque without it.