that msg is in virtually every processed food we buy (or steal if your into that sort of thing). It can be hidden as it is an additive to an additive that IS listed.
There was an interesting item on our local/national news tonight about a student working a summer job in a chem lab in Alberta studying the effect of msg on snails. (say what?) Her mentor was being interviewed, and said her insights into the effects on living cells is so significant she will be publishing them. Scary!