If you have an MSG sensitivity you might want to also avoid corn, peas, tomatoes, fermented soy products, and parmesan cheese. They naturally contain relatively high levels of monosodium glutamate along with very high levels of bound glutamates (aka glutamic acid). Parmesan cheese, in fact, has more naturally occurring MSG by weight than many "evil MSG-laden" soy sauces.
Natual MSG levels (in mg/100g)
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Chinese soy sauce - 1090
Japanese soy sauce - 782
parmesan cheese - 1200
tomatoes - 140
peas - 200
corn - 130
cow milk - 2
human milk - 22
eggs - 23
chicken - 44
duck - 69
beef - 33
pork - 23
salmon - 20
Brad