I get very bad headaches from eating seaweed snacks. I absolutely love them, mind you, but it's like clockwork. I've had this postulated to be as the result of

I get very bad headaches from eating seaweed snacks. I absolutely love them, mind you, but it's like clockwork. I've had this postulated to be as the result of MSG, but that doesn't track with me. There's MSG in all sorts of things, and no other food comes to mind as specifically giving me a headache.