I was reading through a new study on migraine headaches. Food has been known to play a role in migraines. Subjects were tested for reactions to certain foods. The category with the most positive skin prick test results was spices.
The food categories from most frequent IgG positivity to least
Number of patients with positive test result (n=30)
Seeds and nuts
Milk and milk products
From: Cephalalgia. 2010 July; 30(7): 829–837.
The authors found that avoiding the offending foods helped lower migraines:
"We also calculated if the patient showed at least a 30% reduction and at least a 50% reduction for attack count and number of headache days using elimination diet compared to provocation diet and to the baseline period."
I thought this was an interesting result given the almost universal dietary advice to use spices. Even the newest Paleo books say to use spices.
What would cause spices to be so allergenic? I don't know, but allergies to spices have been previously reported . Hopefully, there will be more research on this subject.