I can't claim to have tried the Fissure Heal, but the problems with comfrey are mostly from ingesting it. Applied as a suppository, it is not absorbed very much and it acts very locally. There are also varieties of comfrey that do not have the toxic components that are the source of concern, but I don't know what species they use in the formula.
There is a thread about
suppositories (but not Fissure Heal): https://www.healingwell.com/community/default.aspx?f=17&m=1226969
Post Edited (Keeper) : 9/1/2008 10:54:19 PM (GMT-6)