Comfrey Leaf Powder

Comfrey leaf was once a common medicinal herb, with alternate names like boneset and knitbone indicating its former use. Today, oral products that contain comfrey are banned in the U.S. and most of Europe due to potential liver toxicity.
Powdered comfrey leaf, however, may be used to make poultices, ointments, salves and creams for minor skin irritations where there is no broken skin.