I've looked into zeolite a lot, and there is a lot of polarization of opinions about it.

All of the studies I've seen have been conducted by manufacturers, which lowers credibility, however, I've heard from a number of people who say it's worked well for them. Of course, people have a hard time knowing if something works for them or if it's just the natural progression of the body detoxing.

I've seen a study that showed that perhaps 50% of zeolite products either:

1. contain NO zeolite, or
2. contain heavy metals.

So you must find a product that's been tested in both regards.

Although I usually like doing things naturally, I personally prefer oral DMSA for mercury detox. Here's a plan that I personally like: http://urlbam.com/ha/M006Z