Fast food woes

I came to the realization, over the Christmas break, that fast food is no longer an option for us.  William has had four significant (although not anaphylactic) reactions to fast food over the last several weeks, all of these to frozen French fries.  Checking the companies' websites has revealed nothing, I suspect that the culprit is sulphites in the citric acid (sulphites are used in the process of producing citric acid), so we'll be keeping a better eye on citric acid-containing foods, too, to see if these are causing a problem as well, or if it's just specific kinds/brands of citric acid.  At this point, who knows?

Also, there seems to be some research to back this up, specifically this paper, along with several others. In the meantime, it's rather unlikely we'll be eating any fast food until I can get this sorted out.  On the plus side, it means we're eating far, far healthier than we had been.