The brand my Naturopath gave me has a mixture designed to be use in the mouth on dental trama sites. Its "Zeolite" clay I believe, mixed with some other things.
I mix it with a heavy metal chelation mixure, some HCL in a capsule, and a concentrated green tea extract, per the instructions of my natruopath.
It seems to work, I have had "major" dumps of toxins and die-offs of parasites after just doing 3 sites in my mouth.