Mustard originally came from China and has by now been established as the most popular condiment in Central Europe. Mustard contains mustard seed oil, glycosides and more than 20 % protein. These protein compounds can cause allergic reactions. The allergenic potential of mustard is quite high: a few milligrams suffice to cause an allergic reaction. [1] However, as yet only few people in Germany are afflicted by an allergy to mustard.
The allergens causing pathological reactions to mustard are very heat-resistant and hard to degrade enzymatically. [2] Mustard allergies are especially common in France; that is probably due to the many different kinds of mustard used in French cuisine.