For people in my family, white flour specifically is a big trigger, in additional to other substances I listed in other comments (processed food and VOCs). Wit

For people in my family, white flour specifically is a big trigger, in additional to other substances I listed in other comments (processed food and VOCs). With white flour, I don't even think it is the pesticides, because I know at least one family member for whom it was a trigger before we moved to a country which uses them for everything.