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Bentonite Clay

adsorbing toxins and impurities

Evidence · Grade C
Traditional useInteraction risk

Bentonite clay is a natural adsorbent clay traditionally used for detoxification, though scientific evidence for its health benefits, especially for mold illness, is limited.

Last reviewed June 5, 2026 · AI-assisted, human-reviewed
Bentonite clay is a natural absorbent clay, primarily composed of montmorillonite, known for its ability to bind to various substances. In the context of Mold Illness/CIRS, it is often utilized to help sequester mycotoxins and other environmental toxins from the gastrointestinal tract.

Quick answer

What it is: Bentonite clay is a natural absorbent clay, primarily composed of montmorillonite, known for its ability to bind to various substances.

May support:Mold Illness / CIRS

Evidence:Evidence · Grade C

Evidence Summary

Evidence · Grade C

The current evidence grade for bentonite clay, particularly concerning mold illness/CIRS, is low due to a lack of direct human clinical trials. While there are theoretical mechanisms and some in vitro or animal studies suggesting its adsorptive properties, these do not translate directly to clinical efficacy in humans for complex conditions.

Last reviewed · Jun 2026

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Why It Works

Bentonite clay possesses a negative charge and a large surface area, allowing it to attract and bind positively charged toxins, such as mycotoxins, through adsorption. This binding prevents the toxins from being absorbed into the bloodstream from the gut, facilitating their elimination through feces.

How it works in more detail

Bentonite clay, particularly its montmorillonite component, possesses a negative charge and a large surface area. This allows it to attract and bind to positively charged ions, such as heavy metals and various toxins, through a process called adsorption. When ingested, it is thought to pass through the digestive tract, adsorbing substances and preventing their absorption into the bloodstream, thus aiding in their elimination. Its layered structure can also trap substances within its interlayers.

How to use

Always consult a qualified clinician.

Editorial guidance

Suggested dosage
Dosages vary widely, but common recommendations are 1/2 to 1 teaspoon mixed in water once daily, taken away from food and medications.
Typical forms
Powder, Capsule
Quality markers
Look for food-grade bentonite clay that is tested for heavy metal purity. Reputable brands often provide certificates of analysis. Fine, smooth texture and a neutral odor are also indicators of quality.
Medication interactions
  • Oral medications (may reduce absorption)
  • Nutrient supplements (may reduce absorption)
Avoid if
  • Pregnant or breastfeeding (due to lack of safety data)
  • Taking medications (potential for binding and reduced absorption)
  • Known intestinal obstruction

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Suggested dosage

Dosages vary widely, but common recommendations are 1/2 to 1 teaspoon mixed in water once daily, taken away from food and medications.

General guidance — discuss specifics with a clinician.

Active medicinal compounds

Montmorillonite (primary component), various trace minerals (e.g., calcium, magnesium, iron, potassium, sodium).

Traditional use

Bentonite clay has a long history of traditional use by indigenous cultures worldwide for various purposes, including internal detoxification, wound healing, and skin ailments. It was often consumed mixed with water or applied as a topical paste for drawing out impurities.

Safety

Safety warnings

May cause constipation in some individuals. It's crucial to ensure adequate hydration when using bentonite clay. Avoid inhalation of dry clay powder.

Avoid if

  • Pregnant or breastfeeding (due to lack of safety data)
  • Taking medications (potential for binding and reduced absorption)
  • Known intestinal obstruction

Medication interactions

  • Oral medications (may reduce absorption)
  • Nutrient supplements (may reduce absorption)

Reported side effects

  • Constipation
  • Bloating
  • Digestive discomfort

General guidance — discuss specifics with a clinician.

Evidence ecosystem

Scientific literature, clinical guidance, government sources, ongoing research, traditional use, and lived experience — grouped by source type and quality.

No indexed evidence yet. We're still building out this remedy's evidence ecosystem.

Limitations: Key limitations include the absence of human clinical trials specifically investigating bentonite clay for mold illness or CIRS. Most available research is either in vitro, animal-based, or focuses on general detoxification rather than specific conditions. There is also a lack of standardized dosages, formulations, and long-term safety data in human populations.

This page is educational. Statements use phrases like "may support" and "has been studied for"because no remedy here is approved to cure, treat, or reverse any condition. Discussion happens on the ailment pages — community statistics here are derived from those reports. Always consult a qualified clinician.

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