Comfrey

Comfrey is a member of the Boraginaceae family. Comfrey is also commonly known as Blackwort or Slippery Root, however, it's scientific name is Symphytum officinale. Comfrey herbs are used for their root, rhizome, and leaf. Comfrey contains allantoins, tannins, mucilages (fructans), triterpene saponins such as symphytoixde A, and silicic acids. Comfrey is also made up of pyrrolizidine alkaloids such as symphytine and lasiocarpine. Therefore, comfrey should be used with caution orally as pyrrolizidine alkaloids are hepatotoxic and possibly carcinogenic, mutagenic, and teratogenic.

Externally, comfrey is used for bruises, sprains, and the promotion of bone healing. It is used on blunt injuries.

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