Assertion: comfrey's substance | /r/MadeOf | pyrrolizidine alkaloids
Facets:
Source sentences:
text: The FDA ruling banned the internal use of Symphytum officinale (common comfrey), S. asperum (prickley comfrey), and S. x uplandicum (Russian comfrey), as well as any other plant/substance containing pyrrolizidine alkaloids.
text: The FDA ruling banned the internal use of Symphytum officinale (common comfrey), S. asperum (prickley comfrey), and S. x uplandicum (Russian comfrey), as well as any other plant/substance containing pyrrolizidine alkaloids.