zeolites, ehhh. The CEO of NPHC has a MLM that pushes zeolite cancer "treatment" crap to people. They are a common one with the "purify my body and clean all the toxins out" kinda people who are too dumb to figure out that just healthy living does that. They are a fairly interesting subject. I don't know about their catalytic properties though. As they essentially, when clean they are a pretty "neutral" filter.