Which of the “Six Foods” Would You Eliminate First?

For a young man with eosinophilic esophagitis, which potential allergen is most likely the cause of his symptoms?

A 25-year-old man with eosinophilic esophagitis (EoE) that is partially responsive to topical corticosteroids is interested in dietary treatment. He has read about the six-food elimination diet and inquires about this option. 

Which of the following foods is the most likely culprit for his symptoms?