Based on the clinical examinations, the specific IgE analyses, and a celiac screening test, children with complete avoidance of one or more of the individual foods; milk, egg, cod or wheat due to perceived FHS were categorized into the following FHS phenotypes: allergy (29%), outgrown allergy (19%) or lactose intolerance (40%), or unclear (12%). The gene discussed is IGHE; the disease is lactose intolerance.