Hi Joan
So far as I understand it, zeolite is volcanic ash and suffers from some of the same ills as vermiculite and asbestos. It is carcinogenic!
If you do a google search for "zeolite cancer", you'll find a lot of research indicating the carcinogenic properties of zeolite.
There is a lot of hype out there, promoting zeolite. But it seems pretty much unfounded. If you have links to definitive research studies, unequivocally demonstrating that zeolite deals with cancer, without danger, I'd be very interested to check them out. In the world of science, testimonials are worth very little.
When you look at the marketing of nutritional supplements from the eye of a cancer patient, the hype stands out a mile. To parody Mark Twain/Benjamin Disraeli and various others to whom the saying has been attributed, "There's lies, damned lines, statistics, and advertising."
Of course, everyone has to make a living. But to do so while maintaining complete integrity is often a challenge. Most advertising is a step on the road to lack of integrity. It's a shame folk have to hype things up. But it seems that the less the evidence, the greater the hype!
Take care