Digestive and physiologic effects of a wheat bran extract, arabino-xylan-oligosaccharide, in breakfast cereal - PubMed (original) (raw)

Clinical Trial

. 2012 Nov-Dec;28(11-12):1115-21.

doi: 10.1016/j.nut.2012.02.010. Epub 2012 Jul 6.

Glenn R Gibson, Robin S Dickmann, Cyril W C Kendall, C-Y Oliver Chen, Adele Costabile, Elena M Comelli, Diane L McKay, Nelson G Almeida, David Jenkins, Gordon A Zello, Jeffrey B Blumberg

Affiliations

Clinical Trial

Digestive and physiologic effects of a wheat bran extract, arabino-xylan-oligosaccharide, in breakfast cereal

Kevin C Maki et al. Nutrition. 2012 Nov-Dec.

Abstract

Objective: We assessed whether a wheat bran extract containing arabino-xylan-oligosaccharide (AXOS) elicited a prebiotic effect and influenced other physiologic parameters when consumed in ready-to-eat cereal at two dose levels.

Methods: This double-blind, randomized, controlled, crossover trial evaluated the effects of consuming AXOS at 0 (control), 2.2, or 4.8 g/d as part of ready-to-eat cereal for 3 wk in 55 healthy men and women. Fecal microbial levels, postprandial serum ferulic acid concentrations, and other physiologic parameters were assessed at the beginning and end of each condition.

Results: The median bifidobacteria content of stool samples (log₁₀/grams of dry weight [DW]) was found to be higher in the subjects consuming the 4.8-g/d dose (10.03) than in those consuming 2.2 g/d (9.93) and control (9.84, P < 0.001). No significant changes in the populations of other fecal microbes were observed, indicating a selective increase in fecal bifidobacteria. Postprandial ferulic acid was measured at 120 min at the start and end of each 3-wk treatment period in subjects at least 50 y old (n = 37) and increased in a dose-dependent manner (end-of-treatment values 0.007, 0.050, and 0.069 μg/mL for the control, AXOS 2.2 g/d, and AXOS 4.8 g/d conditions, respectively, P for trend < 0.001).

Conclusion: These results indicate that AXOS has prebiotic properties, selectively increasing fecal bifidobacteria, and increases postprandial ferulic acid concentrations in a dose-dependent manner in healthy men and women.

Copyright © 2012 Elsevier Inc. All rights reserved.

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