My friend has been suffering from sulfite allergy for couple of months now and also uses some meds for it. As she has explained, she will have to avoid a lot of food from now on and even some hygiene products and meds that contain that substance. I would like to know how people with sulfite food allergy figured it out?
Well, when you have constant allergy symptoms and you cannot determine what is that from, you do the allergen tests and find out what is the substance you are allergic to. The simplest form of that test is applying small patches of the various allergens (in small doses of course) on the skin of the arm and wait for the reaction.