The article in the OP is about as fact-free as one can get.
Until better research is conducted, I am going to stick with my belief that MSG can cause throbbing in the temples. I’ve experienced it, and no study has refuted it.
From the article cited in the OP:
"While MSG might cause headaches in some people…”
This paper does not refute that:
BTW, I eat food flavored with MSG…