Intestinal fructose malabsorption is associated with increased lactulose fermentation in the intestinal lumen.

Objective: To study fructose malabsorption in children and adolescents with abdominal pain associated with functional gastrointestinal disorders. As an additional objective, the association between intestinal fructose malabsorption and food intake, including the estimated fructose consumption, weight, height, and lactulose fermentability were also studied.

Methods: The study included 31 patients with abdominal pain (11 with functional dyspepsia, 10 with irritable bowel syndrome, and 10 with functional abdominal pain).

Water Load Test in Childhood Functional Abdominal Pain: No Relation to Food Intake and Nutritional Status.

This cross-sectional study evaluates the relations between the water load test in childhood functional gastrointestinal disorders with food intake and nutritional status. Patients with functional dyspepsia required a lower maximum water intake to produce fullness (n = 11, median = 380 mL) than patients with irritable bowel syndrome (n = 10, median = 695 mL) or functional abdominal pain (n = 10, median = 670 mL) (P < 0.05).