Bentonite Clay
Also known as: sodium bentonite, calcium bentonite, montmorillonite clay, mineral clay
Effective Dosage
No established dose for human supplementation based on provided studies
What the Science Says
Bentonite clay is a naturally occurring mineral clay with a strong negative charge that allows it to bind to certain toxins and heavy metals. In animal studies, it has been used as a mycotoxin binder — added to contaminated feed to reduce the absorption of harmful mold toxins like aflatoxin. It has also been studied as a carrier material in cosmetic formulations to help deliver other active ingredients deeper into the skin.
What It Doesn't Do
No human clinical evidence it 'detoxes' your gut or body. No proof it removes heavy metals or toxins when swallowed as a supplement. Animal feed research does not translate directly to human health benefits. Not shown to improve digestion, boost immunity, or clear skin when taken orally. The 'detox' marketing around this ingredient is not backed by human trials.
Evidence-Based Benefits
Bentonite clay is primarily used for its adsorptive properties, which may help in detoxification by binding to toxins and impurities in the gut. Some clinical trials suggest it may aid in digestive health and alleviate symptoms of gastrointestinal disorders.
Moderate EvidenceEffective at: No established dose
Source: auto-research
Absorption & Bioavailability
Poor — bentonite clay is not absorbed by the body. It works (in animal models) by binding substances in the gut and passing through. This also means it may bind beneficial nutrients and medications.
Red Flags to Watch For
- May bind and reduce absorption of prescription medications, vitamins, and minerals if taken together
- Some commercial bentonite clay products have been found to contain elevated levels of lead — the FDA has warned consumers about specific products
- All meaningful efficacy data comes from animal studies (pigs, dairy cows), not human clinical trials
- Marketed heavily as a 'detox' supplement despite no human evidence supporting this claim
- Long-term oral use has not been studied for safety in humans
Products Containing Bentonite Clay
See how Bentonite Clay is used in these analyzed products:
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-06