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.
| Original language | English |
|---|---|
| Pages (from-to) | 1115-21 |
| Number of pages | 7 |
| Journal | Complete Nutrition |
| Volume | 28 |
| Issue number | 11-12 |
| DOIs | |
| Publication status | Published - 10 Jul 2012 |
Keywords
- Adult
- Aged
- Bifidobacterium
- Breakfast
- Cohort Studies
- Coumaric Acids
- Cross-Over Studies
- Dietary Fiber
- Digestion
- Double-Blind Method
- Edible Grain
- Feces
- Female
- Food, Fortified
- Humans
- Illinois
- Male
- Middle Aged
- Oligosaccharides
- Plant Extracts
- Triticum
- Xylans