Thanks for all the helpful links. I have a lot more reading to do as this word "glutamate" keeps popping in a lot of reading I've already done. It came up yesterday as I researching things that can affect tendons.

Based on some things I've read on the web, this Chinese restaurant I went to last night does not use MSG. If that's true, something else got me. How I felt before I ate and how I felt after was like night and day.