Assertion: comfrey's use | /r/HasProperty | limited
Facets:
value: to topical use for safety reasons
type: PURPOSE
Source sentences:
text: Use of comfrey is now limited to topical use for safety reasons.
text: Its internal use is a bit controversial, as the U.S. Food and Drug Administration has issued warnings about comfrey’s pyrrolizidine alkaloid content, which can cause liver damage at high doses, but you’ll find herbalists recommending its limited use as a tea as well as in topical applications.