Assertion: comfrey's pyrrolizidine alkaloid | /r/HasProperty | absorbed through the skin
Facets:
Source sentences:
text: Because comfrey contains at least eight different poisonous pyrrolizidine alkaloids that are absorbed through the skin and build up in the liver, it cannot be used on many skin conditions that involve openings in the skin, such as abrasions or skin ulcers.
text: Pyrrolizidine alkaloids can be absorbed through the skin as well.