Evidence supporting the use of: Comfrey
For the body system: Skeletal System (Bones)

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Synopsis

Source of validity: Traditional
Rating (out of 5): 3

Comfrey (Symphytum officinale) has been traditionally used for centuries to support bone healing and musculoskeletal health. The plant was commonly referred to as "knitbone" in folk medicine, reflecting its historical use in treating fractures, sprains, and bruises. Comfrey roots and leaves contain allantoin, a compound believed to promote cell proliferation and tissue repair, as well as rosmarinic acid and other phytochemicals with anti-inflammatory effects. Historical records from Europe and Asia detail applications of comfrey poultices or compresses directly to the skin over fractures or injuries, and its use persists in some herbal traditions today.

However, modern clinical evidence for comfrey's effectiveness in supporting the skeletal system is limited and largely restricted to topical applications. Some small studies and case reports suggest that comfrey ointments may help reduce pain and inflammation in minor injuries, but robust clinical trials specifically investigating bone healing are lacking. Importantly, comfrey contains pyrrolizidine alkaloids, compounds known to be hepatotoxic and potentially carcinogenic if ingested or used chronically. Because of these safety concerns, internal use of comfrey is discouraged in most countries.

In summary, comfrey's use for bone support is primarily based on traditional knowledge and historical practices, with limited scientific validation and significant safety concerns regarding internal use.

More about comfrey
More about Skeletal System (Bones)

Other body systems supported by comfrey

Gums
Joints
Skeletal System (Bones)
Skin

Products containing comfrey

We currently have no products on Vitabase that contain this ingredient.