I had this allergy as a young child. I would eat a lot of Heinz ketchup and then my face would get this red rash all over. When I was about 8 or so the allergy disappeared and I was able to eat it again. I was able to eat it until I was 17. I was sitting in the school lunchroom eating fries, with ketchup duh. My school happens to only serve Heinz products. I went back to class after eating it and my friends told me I looked really red all over. I went into the bathroom and looked in the mirror and discovered that I was breaking out with hives. I called my brother to bring me some Benadryl and that made the hives go away. I tried to eat ketchup the next day and the same thing happened, only slightly worse. I am able to eat every other brand out there but just not Heinz. I don't know if its some kind of preservative or something. I was just wondering if anyone else had to deal with this. It does make life a little harder because almost every single restaurant serves Heinz because its cheaper. I have actually found a couple of restaurants that serve off brands but not many.