Hello marshlea1 ~ wow! Out of all of the 15 yedda questions that i took the time today to answer, yours is very interesting. About 12 of other questions were simply rediculous. I did an internet search, and did not find any answers for you. I recall that while i was at tufts university (dmd 1987), i did learn that there is a cinnamon allergy amongst folks with lichen planus. I would recomment telephoning the american dental association Http://www.Ada.Org/ And ask them for research. If you do not get any results, please email me and i will try and help you out. Best wishes, jim
