Nutrients, Vol. 17, Pages 3269: Ultra-Processed Foods and Respiratory and Allergic Diseases in Childhood: Epidemiological Evidence and Mechanistic Insights
Nutrients doi: 10.3390/nu17203269
Authors:
Michele Miraglia del Giudice
Giulio Dinardo
Carolina Grella
Alessandra Perrotta
Cristiana Indolfi
Angela Klain
Ultra-processed foods (UPFs) are increasingly consumed worldwide, particularly during childhood, raising growing concerns for health. Although UPFs have been associated with obesity and cardiometabolic disorders, emerging evidence suggests a potential role also in respiratory and allergic diseases. This review critically examines the epidemiological evidence and biological mechanisms linking UPF consumption to respiratory and allergic outcomes in children. To this end, a structured literature search was conducted in the PubMed database, including articles published between 2006 and 2025, selected based on their relevance to the association between UPF consumption and asthma, wheezing, or food allergies in the pediatric population. Four cohort studies on asthma and wheezing, conducted mainly in Brazil and Spain, and two cross-sectional studies—including one global multicenter study—were identified. In addition, four pediatric studies on food allergies from Europe and South America were found, consisting of two cohort studies and two cross-sectional studies. The proposed mechanisms include disruption of the gut barrier, microbiota dysbiosis, chronic inflammation through the AGE–RAGE axis, skewing of immune responses toward a Th2 profile, and indirect effects through obesity and micronutrient deficiencies. Similar pathways may promote allergic sensitization and the development of food allergies. Although current evidence supports the potential role of UPFs in pediatric respiratory and allergic diseases, further longitudinal and interventional studies are needed. Meanwhile, promoting fresh and minimally processed dietary patterns may help protect children’s respiratory and immune health.
Ultra-processed foods (UPFs) are increasingly consumed worldwide, particularly during childhood, raising growing concerns for health. Although UPFs have been associated with obesity and cardiometabolic disorders, emerging evidence suggests a potential role also in respiratory and allergic diseases. This review critically examines the epidemiological evidence and biological mechanisms linking UPF consumption to respiratory and allergic outcomes in children. To this end, a structured literature search was conducted in the PubMed database, including articles published between 2006 and 2025, selected based on their relevance to the association between UPF consumption and asthma, wheezing, or food allergies in the pediatric population. Four cohort studies on asthma and wheezing, conducted mainly in Brazil and Spain, and two cross-sectional studies—including one global multicenter study—were identified. In addition, four pediatric studies on food allergies from Europe and South America were found, consisting of two cohort studies and two cross-sectional studies. The proposed mechanisms include disruption of the gut barrier, microbiota dysbiosis, chronic inflammation through the AGE–RAGE axis, skewing of immune responses toward a Th2 profile, and indirect effects through obesity and micronutrient deficiencies. Similar pathways may promote allergic sensitization and the development of food allergies. Although current evidence supports the potential role of UPFs in pediatric respiratory and allergic diseases, further longitudinal and interventional studies are needed. Meanwhile, promoting fresh and minimally processed dietary patterns may help protect children’s respiratory and immune health. Read More