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Nutr Res. 2018 Dec;60:33-42. doi: 10.1016/j.nutres.2018.09.007. Epub 2018 Sep 21.

In healthy adults, resistant maltodextrin produces a greater change in fecal bifidobacteria counts and increases stool wet weight: a double-blind, randomized, controlled crossover study.

Author information

1
Food Science and Human Nutrition Department, University of Florida, 359 FSHN Bldg, 572 Newell Dr, Gainesville, FL 32611, USA. Electronic address: aburns22@ufl.edu.
2
Food Science and Human Nutrition Department, University of Florida, 359 FSHN Bldg, 572 Newell Dr, Gainesville, FL 32611, USA. Electronic address: rsolch@ufl.edu.
3
Food Science and Human Nutrition Department, University of Florida, 359 FSHN Bldg, 572 Newell Dr, Gainesville, FL 32611, USA. Electronic address: jennifercdennis@ufl.edu.
4
Department of Epidemiology, University of Florida, Emerging Pathogens Institute, Gainesville, FL 32610, USA. Electronic address: mukhanova@epi.ufl.edu.
5
Food Science and Human Nutrition Department, University of Florida, 359 FSHN Bldg, 572 Newell Dr, Gainesville, FL 32611, USA. Electronic address: cjnieves@ufl.edu.
6
Department of Epidemiology, University of Florida, Emerging Pathogens Institute, Gainesville, FL 32610, USA. Electronic address: vmai@epi.ufl.edu.
7
MCC Statistical Consulting LLC, 2219 NW 23rd Terrace, Gainesville, FL 32605, USA. Electronic address: marycchristman@gmail.com.
8
ADM/Matsutani, LLC, Itami City, Hyogo, Japan. Electronic address: dennis.gordon@ndus.edu.
9
Food Science and Human Nutrition Department, University of Florida, 359 FSHN Bldg, 572 Newell Dr, Gainesville, FL 32611, USA. Electronic address: henken@ufl.edu.

Abstract

Dietary fiber stimulates the growth of potentially beneficial bacteria (eg, bifidobacteria), yet most Americans do not meet daily fiber recommendations. Resistant maltodextrin (RMD), a fermentable functional fiber, may help individuals meet total fiber recommendations and potentially increase bifidobacteria. It was hypothesized that fecal bifidobacteria counts/ng fecal DNA would increase after adding 25 g RMD to inadequate fiber diets of healthy adults. In this double-blind, controlled crossover study, 51 participants (26.3 ± 6.8 years, mean ± SD) were randomized to consume 0, 15, and 25 g RMD daily for 3 weeks followed by a 2-week washout. Participants collected all stools for 2 days at weeks 0 and 3 of each intervention for stool wet weight (WW) measurements and fecal bifidobacteria counts. Weekly 24-hour dietary recalls assessed total fiber intake. Only 25 g RMD resulted in a change (final minus baseline) in bifidobacteria that was significant compared with 0 g (0.17 ± 0.09 vs -0.17 ± 0.09 log10[counts], respectively, mean ± SEM, P = .008). Stool WW increased only with 25 g (150 ± 11 vs baseline 121±11 g/d; P = .011). Mean daily total fiber intake (including RMD) was significantly higher (both P< .001) with 15 g (17.8 ± 0.6 g/1000 kcal or 4184 kJ) and 25 g (25.3 ± 1.1 g/1000 kcal) compared with 0 g RMD (8.4±0.4 g/1000 kcal). Mean daily total fiber intakes exceeded recommendations (14 g/1000 kcal) with 15 and 25 g of RMD, and 25 g RMD increased fecal bifidobacteria counts and stool WW, suggesting health benefits from increasing total fiber intake.

KEYWORDS:

Bifidobacteria; Gastrointestinal function; Healthy adults; Resistant maltodextrin; Stool wet weight

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