As with every Natural 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 the responses to this criticism.

Jonathan Campbell's attack on liquid zeolite

Health consultant Jonathan Campbell raises some of his concerns regarding zeolite. Deitsch responds.

Edward Friedlander's pessimistic diatribe on zeolite

Being a pathologist, Friedlander seems to offer scientific criticism. But all is not what it seems.

Rik Deitsch's response to Denali's criticisms

Denali Inc. had put out some disinformation about the NCD brand zeolite causing heart palpitations.