I found that MSG did precisely that. After eating in Chinese restaurants I always had sharp prickly tingling in the back of my neck.
Recently, my son told me that MSG was not harmful and had no harmful effects.
So I did a double blind study. I had my beloved live-in partner put Accent on a variety of dishes when I wasn't looking. For two weeks during which time she did this I never noticed anything unusual.
I was duped by an urban legend for many years of my life. Not a big loss but a loss nevertheless.