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White bread good for the gut
06/24/14 12:03 PM
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Pilot Study of Diet and Microbiota: Interactive Associations of Fibers and Polyphenols with Human Intestinal Bacteria
Adriana Cuervo †, Lorena Valdés ‡, Nuria Salazar ‡, Clara G. de los Reyes-Gavilán ‡, Patricia Ruas-Madiedo ‡, Miguel Gueimonde ‡, and Sonia González *†
† Department of Functional Biology, Facultad de Medicina, University of Oviedo, C/Julián Clavera s/n, 33006 Oviedo, Asturias, Spain
‡ Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias − Consejo Superior de Investigaciones Cientficas (IPLA-CSIC), Paseo Ro Linares s/n, 33300 Villaviciosa, Asturias, Spain
J. Agric. Food Chem., 2014, 62 (23), pp 5330–5336
DOI: 10.1021/jf501546a
Publication Date (Web): May 23, 2014
Copyright © 2014 American Chemical Society
*(S.G.) Phone: +34 985 10 42 09. Fax: +34 985 10 35 34.
Several studies have addressed the use of dietary fibers in the modulation of intestinal microbiota; however, information about other highly correlated components in foods, such as polyphenols, is scarce.
The aim of this work was to explore the association between the intake of fibers and polyphenols from a regular diet and fecal microbiota composition in 38 healthy adults. Food intake was recorded using an annual food frequency questionnaire (FFQ). Quantification of microbial populations in feces was performed by quantitative PCR.
A negative association was found between the intake of pectins and flavanones from oranges and the levels of Blautia coccoides and Clostridium leptum.
By contrast, white bread, providing hemicellulose and resistant starch, was directly associated with Lactobacillus. Because some effects on intestinal microbiota attributed to isolated fibers or polyphenols might be modified by other components present in the same food, future research should be focused on diet rather than individual compounds.
http://pubs.acs.org/doi/abs/10.1021/jf501546a
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