Something else to deal with. It was pointed out to me, by another in the porphyria club, that, not only are sulfites bad for us, they accumulate, too. So, I started looking for information on sulfites; and, I found this great site: http://holdthesulfites.com/
This site helped me understand sulfites & how to identify offending foods / drugs. This site does not take porphyria concerns into account; it is solely about sulfites. It seems that there are folks who can reach porphyria levels of catastrophic system failure, with sulfite allergies. My heart goes out to them.
The page, on the site, that I refer to is “OK, You Can’t Eat Everything”; this page lists foods with naturally occurring sulfites, foods with added sulfites, and words to look for in the ingredients lists: http://holdthesulfites.com/ok-you-cant-eat-everything/