My understanding of MSG has always to enhance the taste of food. Yes it is true that We've heard a lot of negative things about MSG. We do use much MSG in our home cooking. One thing I do notice is that after a meal at the Chinese Restaurant I get very thirsty.
That is most probably mostly from sodium chloride, table salt. Anyway msg do also contain sodium so it will cause thirstiness to some extent. Was nice to hear about your experience!