Primary eosinophilic gastrointestinal disorders (EGIDs) are emerging inflammatory diseases of unknown etiology which may involve any part of the gastrointestinal (GI) tract and lead to a pathological eosinophilic mucosal infiltration. 1,2 Although their pathogenic mechanisms are mostly unknown, EGIDs seem to be commonly associated with atopy. 3 Based on the GI tract involved, EGIDs are classified in eosinophilic esophagitis (EoE) and non-esophageal EGIDs. EoE is currently considered one of the major causes of upper gastrointestinal morbidity, with a significant burden on patients, caregivers, and the healthcare system. 4 Children with non-esophageal EGIDs may present non-specific GI symptoms, mainly depending on depth (mucosal, muscular, and serosal forms) and the extension of the inflammatory process. 1 On the contrary, patients with EoE generally develop symptoms due to esophageal dysfunction and inflammation. Although the prevalence is still unknown, several studies reported that EGIDs may be associated with malnutrition, including undernutrition, inadequate intake of vitamins and/or minerals, and overweight/obesity. 4 Vitamin D deficiency has also been reported in