Heal-all has long been used as medicine. With us, it was mostly used on wounds, and for heart problems. In the East, it was used for other internal issues, particularly for liver disease. The name Prunella evolved from the ancient name for dropsy. In medicine they say "First do no harm". That may explain the popularity of heal-all, because it is edible, and whatever you do with it, you won't hurt yourself. Prunella treatments are still available from herbal suppliers. Heal-all has been added to my mental list of plants to nibble. As I've researched this stuff, I've discovered several to try. Fair warning to the Ives Preserve crew! We've got some new exploring in store this year.