Table 1: Inclusion and Exclusion Criteria.

	Inclusion Criteria	Exclusion Criteria
Study Design	Randomized Controlled Trials	Case reports, observational studies, systematic and narrative reviews, letters, editorials, and commentaries
Population	Human subjects, age <12 years, confirmed diagnosis of food allergy	Non-human subjects, age >12 years, not diagnosed or treated for food allergy
Intervention	Extensively hydrolyzed protein formula or amino acid-based formula supplemented with probiotics and/or prebiotics	Probiotic and/or prebiotic supplementation without being added to formula
Outcomes	Severity and extent of atopic eczema, fecal characteristics, tolerance, inflammatory factors, anthropometric factors, incidence of infection, allergic symptoms (respiratory, dermatological, gastrointestinal)	Symptoms unrelated to food allergy