IGHE and food allergy: Diagnosis of LTP food allergy was established through a combination of clinical history indicating anaphylaxis to LTP-containing foods (eg, peach, apple, hazelnut) and specific IgE testing for LTP proteins, primarily for peach and/or Pru p 3.LTP-allergic patients had a higher age at treatment initiation, with a mean age of 36.3 years.