I am allergic/ have a reaction to Monosodium Glutamate. (So is my Mum.) Some of the stuff I have read about it in the past does suggest a link between the reaction and MS.
I am only allergic to cats if I don’t have them around all the time. When I was away from home at uni I would have a reaction to them whenever I went home…so now I have 2 and I’m fine.