Claim: Comfrey stimulates regeneration of tissue in teeth and gums and should be used as a mouthwash every day.
Fact-check: Using the herb comfrey on teeth could be dangerous for health - Full Fact
Verdict: there is no evidence for this. using comfrey by mouth can carry risk of liver damage and links to cancer have been found in animal testing.
Organisation: Full Fact
Author: Dr Fergus Brown
Date published: 2023-04-25T00:00:00