Burdock- also helps cleanse the liver

Historical or traditional use: In traditional herbal texts, burdock root is described as a “blood purifier” or “alterative.” Burdock root was believed to clear the bloodstream of toxins. It was used both internally and externally for eczema and psoriasis as well as to treat painful joints and as a diuretic. In traditional Chinese medicine, burdock root in combination with other herbs is used to treat sore throats, tonsillitis, colds, and even measles. It is eaten as a vegetable in Japan and elsewhere.
Burdock root has recently become popular as part of a tea to treat cancer. To date, only minimal research has substantiated this application.
Active constituents: Burdock root contains high amounts of inulin and mucilage. This may explain its soothing effects on the gastrointestinal tract. Bitter constituents in the root may also explain the traditional use of burdock to improve digestion. It also contains polyacetylenes that have been shown to have antimicrobial activity. Burdock root and fruit also have the ability to mildly lower blood sugar (hypoglycemic effect). Even though test-tube and animal studies have indicated some antitumor activity for burdock root, these results have not been duplicated in human studies.