# OnCo record comfrey (technology). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)". Whole corpus: https://onco.cc/api/v1/onco.nt
@prefix schema: <https://schema.org/> .
@prefix onco: <https://onco.cc/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://onco.cc/technologies/comfrey/>
  a schema:MedicalTherapy ;
  onco:kind "technology" ;
  schema:identifier "comfrey" ;
  schema:name "Comfrey"@en ;
  schema:description "Comfrey is a garden plant used for wounds and sold in teas and capsules. Taken by mouth it contains alkaloids that damage the liver and cause cancer in animals, and the US regulator asked manufacturers to withdraw comfrey supplements in 2001. Foxglove mistaken for comfrey has caused poisoning and one death."@en ;
  schema:url <https://onco.cc/technologies/comfrey/> ;
  schema:dateModified "2026-11-04"^^xsd:date ;
  schema:citation <https://www.mskcc.org/cancer-care/integrative-medicine/herbs/comfrey> ;
  onco:status "negative" ;
  onco:tag "complementary", "supportive-care", "evidence:harm" ;
  onco:related <https://onco.cc/technologies/chaparral-herb/>, <https://onco.cc/technologies/kava-kava/> ;
  onco:sections <https://onco.cc/fronts/supportive-care/> ;
  onco:technologies <https://onco.cc/technologies/integrative-oncology/>, <https://onco.cc/technologies/dietary-supplements-treatment-interactions/> ;
  onco:bottlenecks <https://onco.cc/bottlenecks/b-misinformation/> .