Can you be allergic to fruit juice?

Yes. Allergic antibodies (ige) can be formed to any large complex molecule that is recognized as foreign to the body such as: animal and plant proteins or carbohydrates, bacteria, fungi, insect venoms or excrement (dust mites) or even synthetic molecules such as drugs. The presence of ige does not, by it self, confirm true allergy; clinical symptoms occurring after exposure must also be noted.