 Abdominal pain AP-associated functional gastrointestinal disorders FGIDs, particularly Irritable Bowel Syndrome IBS and Functional Dyspepsia FD, are common in pediatrics, and no safe and effective treatment is available. Although probiotics have shown promising results in adults, few studies have been published in children. The Bifidobacterium Infantis, Bifidobacterium Breve and Bifidobacterium Longum are the most important beneficial bacteria in children and represent 95 of the total bacterial population in the intestine of breastfed infant. 