I thought soy sauce was MSG. or at least free glutamate.
yep:
http://answers.yahoo.com/question/in...0025158AAjQR8E
"All soy sauces contain MSG, even the 100% naturally brewed ones. Why? The fermentation process hydrolyzes soy protein. Soy protein contains the amino acid, glutamic acid, some of which is freed as the protein is broken apart. In solution, there's a dynamic equilibrium between glutamic acid and glutamate ion.
Soy sauce also contains salt...we've got both sodium ions and glutamate ions in the same solution. That's logically equivalent to having MSG in the solution..."