COMFREY OILThis infusion is made from certified organic Comfrey leaves (Symphytum officinale) infused (steeped) in a base of olive oil. For over 2000 years Comfrey has been documented in use for general wound healing, treatment of bruises and skin cell growth. Comfrey grows throughout Europe, North America and western Asia. As in any ingredient, herbal or lab created, there is appropriate usage of Comfrey and the flip side is there are a few caveats. Our Comfrey infusion is made from the leaves, not the root. The root is not used as it contains pyrrolizidine alkaloids, which the leaves do not.Comfrey is a tried-and-true herbal component of many products. We feel the benefits far outweight the negative info online. We use a very small amount of the Comfrey oil infusion in Boo Boo Butter, Paw Butter and Elbow Butter. There is no scientific way that a dog could ingest enough to reach toxic levels. Personally, I would rather research and share info than have a knee-jerk reaction and eliminate a good ingredient rather than have to explain why we use it a bit more.