A very helpful article that not only talks about chocolate allergies but allergies in general. It covers why someone might react to chocolate but also what an allergic reaction is, what kind of testing is done, and how to treat it. I like that this article breaks down the ingredients of a typical chocolate bar and shows that many chocolate bars contain some of the top 8 allergens or other highly allergenic foods so it's probably not the cocoa but one of those a person is reacting to.