⚠ Regulatory caution
Updated: 2026-05-29 · v2.0 · Prof. G. Pkhakadze, MD, MPH, PhDCiteEditorial
📰Read the full Bentonite Clay evidence review on GMJ News →Complete clinical article, references and updates on news.gmj.ge. This page is the structured safety summary.
3
Limited
Bentonite Clay
Montmorillonite clay
Limited EvidenceLimitedOther
RDA
Typical 0.5–2 g
Target
<5 µg/dL
Upper limit
No UL
Products
1
Dosage by population group — reference
✅ USP Verified, NSF Contents Certified, ConsumerLab Approved
⚠ FDA lead contamination warnings [2]
⚠ ZERO human evidence for any benefit [2]
⚠ Adsorbs ALL oral medications [2]
⚠ Contains aluminum [1]
ℹ️ Not obtained from food. Not applicable — this is not obtained from food in meaningful amounts; supplementation is the practical route.
🔬 Lab interpreter
Recommended test
Blood lead level (if consumed)
Reference range / target
<5 µg/dL
When to test
If chronic use [2].
FDA-documented contamination [2].
Full lab monitoring ↓
⚕ For professionals — confirm ranges against your local laboratory.
Clinical verdict
Bentonite clay: ZERO evidence for 'detox.' FDA warnings for lead contamination. Adsorbs medications. Contains aluminum. Not recommended for oral use [1] [2].
1 How much do I need?
👤 Adults: Specific dosage data under clinical review
👴 Elderly: Specific dosage data under clinical review
🤰 Pregnancy: See guidance
AVOID [2].
👦 Pediatric: See guidance
AVOID [2].
🏃 Athletes: Standard dose
⚖️ Obesity: Standard dose
Fat-soluble compounds may require dose adjustment in obesity.
🩺 Renal: Consult specialist
Dose adjustment may be needed in renal impairment.
🌱 Vegan: Standard dose

How to take

🍽 Timing: NOT recommended [2].
💊 With food: N/A [2].
🚫 Avoid: Oral consumption [2].
2 Which form?
FormBioavailabilityVeganCost
['Bentonite clay powder/liquid', 'common', "Marketed for oral 'detox' [1]."]StandardCheck label
3 Common questions
Does bentonite clay 'detox'? ▼
ZERO human evidence. Lead contamination is a documented risk. Adsorbs medications. The 'detox' marketing has no scientific basis [2].
Is it safe to eat clay? ▼
Geophagy (clay eating) is a cultural practice in some regions but carries risks: lead/arsenic contamination, medication adsorption, constipation, bowel obstruction, electrolyte imbalances [1] [2].
4 Clinical evidence

Strong

Cation exchange and heavy metal adsorption in vitro: confirmed [1]. Lead contamination in products: FDA-documented [2]. HIGH

Moderate

None for oral health claims [2]. MODERATE

Insufficient

ALL 'detox' claims [2]. ALL oral health claims [2]. LOW
5 Safety, toxicity & adverse events

Absolute contraindications

✕ Bowel obstruction

Relative

⚠ Lead/heavy-metal contamination is documented in some products — sourcing concern
⚠ Binds nutrients and medications — separate by several hours
⚠ Constipation; not an evidence-based 'detox'
⚠ Renal impairment — caution

🚩 Red flags

● ANY bentonite oral consumption — lead contamination risk [2]
● Patient taking medications + bentonite — drug adsorption [2]
6 Interactions

Drug interactions

ALL oral medications Major
Mechanism: Clay adsorbs drugs. [2]
Effect: Reduced drug absorption. [2]
Action: Do NOT take orally [2].
7 Regulatory
FDA: Warnings for lead-contaminated bentonite products [2].
8 US supplement products
1
on-market products containing Bentonite Clay (NIH DSLD)

Brands carrying Bentonite Clay (1)

Click a brand to see its Bentonite Clay products.
Or browse all 1 products in one list →
9 Frequently paired with
Ashwagandha 1 sharedChlorella 1 sharedGinger Extract 1 sharedMilk Thistle 1 shared
10 Cite this page
Vancouver: Pkhakadze G. Bentonite Clay — safety profile [Internet]. Tbilisi: PHIG; 2026 [cited 2026 Jul 17]. Available from: https://supplement.ge/ingredients/bentonite-clay/
APA 7th: Pkhakadze, G. (2026). Bentonite Clay — Safety profile. Public Health Institute of Georgia. https://supplement.ge/ingredients/bentonite-clay/
📋 Editorial information
Author: Prof. G. Pkhakadze, MD, MPH, PhD
Affiliation: David Tvildiani Medical University (DTMU)
First published: January 2026
Last reviewed: 2026-05-29
Next review: January 2027
References: 2 cited sources
COI: SupplementIndex receives no funding from supplement manufacturers. All content independently authored by PHIG.
Process: Systematic literature review
📄 License & reuse
Published under Creative Commons Attribution 4.0 International (CC BY 4.0). You may share and adapt for any purpose with attribution.
Pkhakadze G. "Bentonite Clay — Safety Profile." SupplementIndex, PHIG, 2026. https://supplement.ge/ingredients/bentonite-clay/ CC BY 4.0.
GP
Prof. G. Pkhakadze, MD, MPH, PhD
Professor of Public Health · Head of Department, DTMU
Editor-in-Chief, Georgian Medical Journal (ISSN 3088-4322)
Chair, Public Health Institute of Georgia · UEMS Public Health Section
Educational and public health purposes. CC BY 4.0. Consult your healthcare provider before starting any supplement. Corrections: info@accreditation.ge. Publisher: PHIG