Evidence supporting the use of: Clay
For the health condition: Heavy Metal Poisoning

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Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Clay, particularly bentonite and montmorillonite clays, has a long history of use in traditional medicine systems for detoxifying the body, including purported use in cases of poisoning. The rationale for using clay is based on its adsorptive properties; when ingested, the clay particles are believed to bind toxins, including some heavy metals, in the gastrointestinal tract and prevent their absorption. Ethnomedical reports from various cultures—such as the use of clay in geophagy in Africa and by indigenous groups elsewhere—support its traditional use for general detoxification and as a remedy for stomach ailments. However, scientific evidence supporting the efficacy of clay for treating heavy metal poisoning in humans is limited. Most studies are in vitro or in animals and suggest that certain clays can adsorb metals like lead, cadmium, or mercury from solutions. A few animal studies show reduced absorption of heavy metals when clay is co-administered. There is a lack of robust clinical trials in humans specifically evaluating clay for heavy metal poisoning. Mainstream medical practice favors chelation therapy with established pharmacological agents. In summary, the use of clay is justified by tradition and some preliminary scientific rationale, but high-quality human data is lacking.

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