question: Thank you.  I have an allergic reaction of swollen lips, sometimes tongue and throat, so I have the prescribed prednisone and the shots, both of which I carry with me at all times.  The cause is preservatives and the dr. has told me to avoid foods from the freezer or microwave that have a long list of preservatives, usually,  and I needed to do detective work myself by comparing the ingredients.  That is very difficult to do.  I sometimes wonder if stress also comes into play when I have a reaction and have only eaten what has been tried and true.  Your opinion, please?    Ina