grandma clayton had 'carcinoid syndrome' as far as I know...my mother was to tell me that she had had so many benign tumours removed....

http://www.nhs.uk/conditions/carcinoid-syndrome/Pages/Introduction.aspx


and so what is tyramine? a trigger of 'flushing' apparently:

"foods containing the substance tyramine, such as aged cheese and salted or pickled meats"

https://en.wikipedia.org/wiki/Tyramine

I've never heard of mistletoe...described as the 'holiday plant' before now...go figure: