Because comfrey may cause liver damage, the FDA no longer permits it to be sold for internal use. However, this herb is used with appropriate caution by knowledgeable herbalists. If you have some dried comfrey in your store of herbs, please pay attention to the warning given under Considerations below.
Historically, comfrey was considered a healing and soothing blood purifier used for strengthening the lungs, stomach, kidneys, and bowels. It is a demulcent and expectorant, traditionally used to treat asthma, coughs, and congestion. The leaves have been used to treat cramps, diarrhea, hemorrhage, ulcers, and tuberculosis. (more…)