I used to use pascalite and bentonite. I'm very sensitive to many things, causing constipation. That's one reason I when with the pyrophyllite. It does not clump like other clays and therefore does not cause constipation for me. This is true, even though Bentonite says that it is good for constipation. Constipation is my biggest problem since childhood; and is probably the reason for my miserable sinuses (also since childhood).
I'm not pushing this clay. Some people will not use such things at all. I don't even use it every day. I just thought it would be interesting for anyone wanting other methods of metal elimination.