Some people react with hypersensitivity when eating certain foods or additives. Typically it is ordinary foods that cause the reactions. To talk about food hypersensitivity it is a requirement that the symptoms: (1) appear when you eat the food you do not tolerate, (2) disappear or diminish when you avoid the food you do not tolerate, and (3) reappear when you reintroduce the food you do not tolerate. EU project EuroPrevall developed free material on food hypersensitivity and food allergy, how it is diagnosed and handled. The full brochure is available on GA²LEN website.