Why Is Comfrey Tea Dangerous?

Comfrey tea has been removed from the health food stores in my state. I would like to grow it for tea. Why is it dangerous and what precautions should I use?

Because comfrey, taken internally, can cause liver damage, I cannot recommend this use. For more information, please see the Q&A section of our website www.richters.com . Enter "comfrey" for the Q&A search. There is additional information on the comfrey ban on the "Issues Page", under "News & Info" on the main menu:
richters.com/show.cgi?page=Issues/issues.html.