As with every alternative health product, liquid zeolite attracts its fair share of criticism. This site would not be an information resource without listing some of this criticism, and responses to it.
Some of the criticism is valid and some is invalid. In our view, the valid criticisms leveled against liquid zeolite would point out the lack of clinical research on the product (although there are loads of testimonials etc.) and the lack of comprehensive independent product testing of the various brands. [This is all about to change as the first peer-reviewed study on NCD brand liquid zeolite will be published in Sept/Oct 2008, opening the door to more liquid zeolite research publications.]
Remember, different brands of liquid zeolite are manufactured in different ways and may well constitute different final products and so you must get the data on the particular brand you are going to use before trusting it with your health, especially if you are unwell and integrating liquid zeolite as the detox component in a comprehensive health plan.