I LOVE Bentonite clay! I have been using for mercury detox and it is helping me feel SOOOOOO much better. I do baths and foot soaks and take it internally.
It has helped with my autoimmune conditions as well.
I get mine from a wonderful company in my home town of Austin that has beautiful clay. They are big advocates of the healing power of clay and are always happy to speak with people about how to use it. Their website is: http://livingclayco.com/