I hadn't heard about the mind state thing until I went onto Wikipedia just now, but I've known I was allergic to Yellow #5 since early childhood. It brings on rapid asthma type symptoms. Also discovered around Halloween time when I ate a large number of orange cookies from the grocery store, that I'll break out in hives all over my body if I ingest enough of the stuff. Have made a point not to do that again.
We found about (about our son's allergy) on Halloween, too, when he was 5. He got an uncontrollable neurologic eye tic that persisted for about a week.