The available nutritional interventions for the management of functional abdominal pain disorders (FAPD) in children are limited. 1,2 Evidence of the efficacy of implementing a diet low in fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAPs) is limited. 2 The rationale for use of a low-FODMAP diet is based on the assumption that a decrease in the short-chain fermentable carbohydrate load, both, prevents the osmotic effect of FODMAPs, resulting in a decrease in small intestine water volume, and limits the exaggerated fermentation of FODMAPs by colonic microbiota and associated gas production, which may alleviate recurrent abdominal pain (RAP). 3 A typical three-step low-FODMAP diet is commonly used in adults with IBS 4 (for a summary of the definitions of a low-FODMAP diet, see Table S1).However, in children with FAPD, a simplified version of the diet, called a "FODMAP-gentle diet" or "bottom-up approach" that excludes only a few foods with high concentrations of FODMAPs and/or a few targeted FODMAPs, also may be used to avoid over-restriction. 5,6 As for all restrictive diets, potential risks need to be considered.The main concerns associated with use of a low-FODMAP diet include alteration of the gut microbiota composition (i.e., decrease in the fecal Bifidobacterium spp.) and dietary inadequacy (including risk of lower