主要是食品添加劑gluten過敏

雜交小麥&食品添加劑("consumption of a food additive termed
“vital gluten,” which has tripled since 1977. Vital gluten is a food
additive made from wheat flour, and it is added to various food products to
improve their characteristics, such as texture.)的推廣直接導致gluten在麵粉中
的含量增加了，所以現在很多人對gluten過敏，而以前就很少。還有牛奶，也跟50年代
的牛奶大不相同。