The following is a list of ingredients, mostly per the Truth In Labeling campaign and their List of Ingredients to Avoid, that either directly contain Processed Free Glutamatic Acid (Exitotoxin and harmful/active component in MSG) or create it during processing; either way, you should avoid all of these ingredients at all cost (unless you favor health problems in your life). The "E" numbers are for European ingredient listings. MSG Truth's list has some brand names included as well as some other sources (such as Parmesan Cheese).
Ingredients to avoid:
anything "hydrolyzed" any "hydrolyzed ... protein"
Anything enzyme modified
Anything protein fortified
Bouillon and Broth
Calcium glutamate (E 623)
Citric acid (breaks down protein to it's constituent amino acids)
Disodium 5 (Guanylate, Isonate, Ribonucleotides)
Flavors(s) & Flavoring(s)
Glutamate (E 620)
Glutamic Acid (E 620)
Magnesium glutamate (E 625)
Milk Powder (used in many low/non fat milks)
Monoammonium glutamate (E 624)
Monopotassium glutamate (E 622)
Monosodium glutamate (E 621)
Natrium glutamate (natrium is Latin/German for sodium)
Natural beef flavoring
Natural chicken flavoring
Natural flavor(s) & flavoring(s)
Natural pork flavoring
"Pea/Soy/Wheat Protein" (if listed as an ingredient, this indicates the pea/soy has been hydrolyzed at least in part and contains Free Glutamic Acid).
Seasonings (the word "seasonings")
Some Binders and Fillers in prescription medications, vaccines and some fluids fed intravenously.
Soy protein concentrate
Soy protein isolate
Soy sauce extract
Taste No. 5 (added 7/7/2010) contains ingredients high in free glutamic acid.
Whey protein concentrate
Whey protein isolate
This page will be updated as needed (when I get time, feedback, and new knowledge).