While I'm very happy for you and your son, it was most likely the nitrites, not the sodium, that affected his behavior. An OD on sodium will just give you high blood pressure.
Best of luck!
I used to have the same thing. An ice allergy. Every time I consumed something with ice in it, I would do unspeakable things with strange women. I used to go to places where they served ice in beverages, and the next morning would wake up with an aching head and some strange woman in the bed next to me. Glad I gave that up.