Binders (Bentonite/Zeolite)

Bentonite Clay · Montmorillonite · Zeolite · Clinoptilolite

Snapshot

Indications	Contraindications
Aflatoxin exposure^{1, 2} Lead absorption³ Irritable bowel syndrome with diarrhea⁴ Osteoporosis⁵	Erionite-containing zeolite^{6, 7}

Zeolite (clinoptilolite) is a porous mineral with adsorption and ion-exchange capacity that may bind toxins in the gut, based mainly on animal studies⁸. They are taken to limit absorption of ingested contaminants, and the uses follow from that: dietary aflatoxin exposure, lead uptake, and diarrhea-predominant irritable bowel syndrome. Modified zeolite is also studied as an adjunct for chemotherapy-induced neuropathy and for osteoporosis. The typical patient is someone with a food-borne or environmental toxin burden.

A tracer trial in healthy adults found purified clinoptilolite sharply reduced enteral lead uptake³. In diarrhea-predominant irritable bowel syndrome, a pilot trial found benefit on some symptoms while the primary responder outcome matched placebo⁴. In a 2020 in vitro digestion experiment, bentonite, clinoptilolite, and montmorillonite also adsorbed amino acids and B vitamins, a finding not tested in humans⁹. Products listing bentonite or zeolite are mostly clay powders and purified or modified clinoptilolite; see Form comparison.

Fibrous zeolites such as erionite are classified as respiratory carcinogens, which is why mineral identity and purification matter¹⁰.

Last updated October 15, 2026. Read how we make monographs.

In the full monograph

52 sources, 34 studies

When to useThe situations practitioners use it for, each with the reason and the study behind it.
SafetyWho should avoid it, who needs extra care, and the side effects reported in studies.
InteractionsThe medicines and supplements it interacts with, the effect of each, and what labeling says to watch.
Protocol notesThe doses used in studies, how and when they were taken, and how the forms on the market compare.
How it worksWhat it is and how it works in the body, in plain terms.
Published studiesThe studies behind each use, popular claims checked against them, and trials still under way.
Word of mouthWhat patients and practitioners report online, kept separate from the clinical evidence.
Clinical perspectiveA closing read of where the evidence is solid, where it is thin, and what has not been studied.

Snapshot

In the full monograph

Sources