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A Pilot and Feasibility Study of Oatmeal Consumption in Children to Assess Markers of Bowel Function
Hannah Paruzynski,Renee Korczak,Qi Wang,Joanne Slavin 한국식품영양과학회 2020 Journal of medicinal food Vol.23 No.5
Inadequate dietary fiber intake contributes to irregular bowel movements and may contribute to difficulty with defecation in children. Whole grain foods, such as oatmeal, may improve stool consistency and stool frequency in children; however, no studies have examined its effects. The purpose of this study was to investigate if 2 weeks of oatmeal consumption in children (ages 7–12 years) increases stool frequency, improves stool consistency, and gastrointestinal (GI) symptoms. In this single-arm intervention study, children who reported ≤5 bowel movements per week during screening, consumed two servings of instant oatmeal daily for 2 weeks. The primary outcome was stool frequency and secondary outcomes included stool consistency and GI symptoms. Participants recorded bowel movements daily, food intake, and GI symptoms during baseline and 2 intervention weeks. Photos of the children's stool were taken at three timepoints during the study to assess stool consistency. In total, 33 children (15 female and 18 male) completed the study. Linear mixed models were used to detect change between baseline and the intervention weeks and accounted for repeated measures within subjects. No statistical differences in stool frequency or consistency were observed between the intervention weeks vs. baseline; however, dietary fiber intake significantly increased during the 2 weeks of oatmeal consumption (P = .008). The addition of oatmeal to children's diets is an effective way to increase fiber consumption and may reduce some GI symptoms such as gas, straining, and feeling of incomplete evacuation. Trial identification number: NCT02868515.
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Derek A. Timm,Ashok Hospattankar,Joanne L. Slavin 한국식품영양과학회 2010 Journal of medicinal food Vol.13 No.4
Dietary fiber fermentation decreases luminal pH by the production of short-chain fatty acids (SCFAs). Additional proposed physiological benefits of fiber fermentation include decreased growth of pathogenic bacteria, increased mineral absorption, and serving as an energy source for the colon epithelium. This study examined three common fiber supplements—wheat dextrin (WD) (Benefiber®, Novartis Consumer Health Inc., Parsippany, NJ, USA), psyllium (PS) (Metamucil®, Procter & Gamble, Cincinnati, OH, USA), and inulin (Fiber Sure®, Procter & Gamble)—for pH, SCFAs, and gas production. An established in vitro fermentation model was used to simulate colonic fermentation at 0, 4, 8, 12, and 24 hours. At 24 hours, WD and inulin significantly decreased pH compared to PS. Inulin produced significantly more hydrogen and total gas. All treatments produced similar total SCFA concentrations at 24 hours; however, the rate of production was different. PS had a declining rate of SCFA production from 12 to 24 hours, whereas WD and inulin had a higher rate during that period. Fast-fermenting substrates may not provide as much SCFAs to the distal colon as slow-fermenting substrates. Differences in fermentation rate, gas production, and SCFA production observed for WD, PS, and inulin may affect their gastrointestinal tolerance and require further study.
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