From the Manufacturer:
In traditional herbal texts, burdock root is described as a “blood purifier” or “alterative” and 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. In Japan, it is eaten as a vegetable.