Question

A true food allergy always: O elicits an immune response causes an immediate reaction creates an aversion to the offending food involves symptoms such as a headache

Answer 1

When the food enters the gastrointestinal tract ,digestion happens when there is an allergen in it the immune system comes into action immediately to react and emit the allergen from the body and trying to protect us.

Usually immediate reactions are rarely seen unless poison otherwise it takes minutes to hours to show signs and symptoms of food allergies Aversion to food generally doesn't occur if cured .when there is a severe fluid loss from the body headache can occur but it is only the immune system acts when there is a true food allergy.