Evidence supporting the use of: Tansy
For the health condition: Parasites (general)

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Synopsis

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

Tansy (Tanacetum vulgare) has a long history of traditional use as a remedy for intestinal parasites, especially in European herbal medicine. Historical texts from the Middle Ages and Renaissance mention tansy as an anthelmintic (a substance that expels worms or other parasites from the intestines). It was commonly administered in teas, infusions, or as an ingredient in folk remedies for treating roundworms and threadworms. The volatile oil in tansy, particularly thujone, is believed to have contributed to its antiparasitic effects, although its toxicity is also well-documented.

Scientific validation for tansy's effectiveness against parasites is limited. While in vitro studies have shown some activity of tansy extracts against certain parasites, there is little robust clinical evidence in humans to support its safety or efficacy. Modern herbalists rarely recommend tansy for internal use due to potential toxicity, particularly neurotoxicity and hepatotoxicity linked to thujone. Regulatory agencies in several countries advise against its internal use for any purpose. In summary, while tansy's use for parasites is well-established in tradition, scientific evidence is weak and concerns about safety outweigh potential benefits.

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