Synopsis

Source of validity: Traditional
Rating (out of 5): 1

Diatomaceous earth (DE) has a long history of traditional use, particularly in agricultural and veterinary contexts, as a means to control external and internal parasites in animals. The rationale behind its use is largely mechanical: DE is composed of fossilized remains of diatoms, which have sharp microscopic edges believed to damage the exoskeletons of insects and potentially harm worms and nematodes in the digestive tract. However, scientific evidence supporting DE’s efficacy against internal parasites (such as nematodes and worms) in humans or animals is limited and inconclusive. Most studies focus on its use as an insecticide for external pests, where it has demonstrated some effectiveness. Research on DE’s impact on internal parasites is sparse; some animal studies suggest minimal or no reduction in parasite load, while others indicate possible mild effects, but the overall quality of evidence is low and inconsistent. Major regulatory and veterinary bodies do not endorse DE as a proven treatment for internal parasitic infestations. In summary, while diatomaceous earth is used traditionally for this purpose, robust scientific validation is lacking, and its use for treating internal parasites should be approached with caution.

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