Anaphylaxis to food typically occurs after ingestion ; however, it can also occur after skin contact with vomited food such as egg and milk , or inhalation of minute food particles; for example, sleeping on pillows stuffed with soy products can cause nocturnal anaphylaxis in soy-sensitized patients. In wheat-dependent exercise-induced anaphylaxis, IgE antibodies to recombinant omega 5 -gliadin are detectable in more than 80% of patients. In their absence, it can be helpful to determine IgE reactivity to other wheat proteins such as α-β-γ-gliadin (especially γ-gliadin) and high molecular weight glutenin