Look into this if you have any of these disorders. I found that MSG is misquoted as an acceptable item for Celiacs on some sites. IT IS NOT, and I will have to do more research and then send information to get those websites update, but in the meantime... here is a great resource.
I left the links active so you may go straight to the http://www.msgtruth.org/states.htm site for the information you are interested in: