[eszed]

Well, my dad got migraines from everything° on that list bar tomatoes - though he did from dried tomatoes, so does that count as everything on the list? I don't know the biological pathway, but it was neither self-diagnosed, self-derived, nor made from woo; he visited several real-MD neurologists before someone identified the chemical(s) at fault, and gave him a list of foods not to eat.

°In fact it was all cheeses, not just parmesan; the more aged the worse. And also chocolate, and olives. Basically anything aged or fermented. I don't know how that lines up with MSG's chemistry, but he was careful with MSG, though nothing like as avoidant as he was with soy sauce and cheese.