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J Pediatr. 2008 Jul;153(1):45-9. doi: 10.1016/j.jpeds.2007.12.044. Epub 2008 Feb 11.

Cutoff volume of dietary fiber to ameliorate constipation in children.

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  • 1Division of Gastroenterology, Department of Pediatrics, Chang Gung Children's Hospital, Chang Gung University College of Medicine, Taoyuan, Taiwan.



To evaluate the proper ingested volume of dietary fiber for relieving constipation in children.


During a 3-year period, we prospectively evaluated the correlation of intake volume of dietary fiber with improvement of constipation in children. Patients were categorized into younger (3-7 years) and older (8-14 years) children. The evaluation period lasted 12 weeks. A good improvement was defined as the child exhibiting at least 60% relief of the constipation symptoms during the observation period. Freedom from constipation was observed during the last 4 weeks.


The study population consisted of 422 patients (213 younger, 209 older), with a mean age of 7.89 +/- 4.71 years. Baseline daily dietary fiber intake of the younger and older groups was 5.97 +/- 2.35 g and 9.83 +/- 3.51 g, respectively. 227 cases (53.8 %) showed improvement of constipation, and 49.1 % of the patients had relief of constipation. Greater intake of dietary fiber was positively associated with good improvement of constipation in both groups (P = .002, and P < .001). Cutoff volumes of daily dietary fiber intake in the relief of constipation were 10 g in the younger group and 14.5 g in the older group.


The cutoff of dietary fiber intake needed to relieve constipation increased with age, achievable in a 12-week intervention.

[PubMed - indexed for MEDLINE]
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