Did Good

Hidden Sources of MSG

My notes:

Be suspicous, if you see these words:
glutamate
autolyzed
hydrolyzed
extract
concentrate
protein
sodium

Since food producers have taken to hidding MSG names, there are at least 4 classes to consider. 

0) My list of MSG
1) Definitely a source of MSG
2) Possible source of MSG, either contained or created in process
3) Suspect of MSG

My List of MSG

hydrolyzed (corn,soy,wheat) protein
E325	sodium lactate

From here down I'm going on the general assumption that a flavour enhancer will mean MSG.
Source: http://www.food-info.net/uk/e/e600-700.htm

E620	Glutamic acid
E621	Mono sodium glutamate
E622	Mono potassium glutamate
E623	Calcium glutamate
E624	Ammonium glutamate
E625	Magnesium glutamate
E626	Guanylic acid
E627	Sodium guanylate
E628	Di-potassium guanylate
E629	Calcium guanylate
E630	Inosinic acid
E631	Sodium inosinate
E632	Di-potassium inosinate
E633	Calcium inosinate
E634	Calcium ribonucleotides
E635	Di-sodium ribonucleotides
E636	Maltol
E637	Ethylmaltol
E640	Glycine and sodium glycinate

Definitely MSG

autolyzed yeast
calcium caseinate
gelatin
glutamate
glutamic acid
hydrolyzed corn gluten
hydrolyzed protein (any protein that is hydrolyzed)
monopotassium glutamate
monosodium glutamate
natrium glutamate (natrium is Latin/German for sodium)
sodium caseinate
textured protein
yeast food
yeast extract
yeast nutrient

Possiblely MSG

anything "Enzyme Modified" or "Modified Enzyme"
Pectin (anything)

Barley malt 
Bouillon 
Broth Seasonings (the word "seasonings")
Carrageenan
Flavors(s) & Flavoring(s)
Malt extract 
Malt flavoring 
Maltodextrin 
Natural flavor(s) & flavoring(s)
Natural pork flavoring
Natural beef flavoring
Natural chicken flavoring
Protein fortified
seasonings
spices
smoke flavoring
soy extract
Soy sauce
Soy sauce extract
Soy protein
Soy protein isolate
Soy protein concentrate
Stock 
textured protein
vegetable gum
Whey protein concentrate
Whey protein isolate

Suspect of MSG

Protease enzymes 
Protease Fungal