I recently learned from reading this forum that people allergic to B-complex are usually allergic
to B3 and
B6. For me there is no doubt that I was reacting
to B6, since I had been trying
to take it separately. My symptoms went away when I stopped taking B6. Someone once asked me if I had been flushing, since niacin will make people flush. No, I had a different symptom altogether that was clearly an allergic response.
Right now, the only B vitamin I'm taking is B2. So far, so good.