Reading food labels- don’t forget

I do not often use bacon because of the histamines, BUT once in a while for a good winter and venison pasta dish it adds a certain something. Yesterday was just such a day and not reading the label- I had really bad reaction! What is E250, E252 and E316 doing in a simple box of bacon? So i am once again reminded to read the labels and stay away from things, I just do not understand. This is one of them!