Food allergy increase among children

Although these two papers, both published in the journal Pediatrics, don't clarify the distinction between increase in incidence and increase in detection, they give you a sense for how weighty an issue this is:

1. Food Allergy Among Children in the United States
2. The Changing Face of Childhood Celiac Disease in North America

Bear in mind that this the tip of the iceberg. These studies depended on antibody testing. Because of  factors that can cause antibodies to not be detected many diagnoses are missed (the 'gold standard' is the elimination-provocation protocol). An assessment of most common childhood disorders is not complete without determining whether food allergy or sensitivity is among the contributing causes.