Journal
NUTRITION
Volume 89, Issue -, Pages -Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.nut.2021.111217
Keywords
Dietary fiber; Prebiotics; Intestinal microbiota; Health benefit; Oligosaccharides
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This review specifies the prebiotic properties of different subgroups of dietary fibers, with only resistant oligosaccharides well documented as prebiotics in the literature. Other fibers are considered potential prebiotics or have no prebiotic effect on humans.
Dietary fiber is a group of heterogeneous substances that are neither digested nor absorbed in the small intestine. Some fibers can be classified as prebiotics if they are metabolized by beneficial bacteria present in the hindgut microbiota. The aim of this review was to specify the prebiotic properties of different subgroups of dietary fibers (resistant oligosaccharides, non-starch polysaccharides, resistant starches, and associated substances) to classify them by prebiotic categories. Currently, only resistant oligosaccharides (fructans [fructooligosaccharides, oligofructose, and inulin] and galactans) are well documented as prebiotics in the literature. Other fibers are considered candidates to prebiotics or have prebiotic potential, and apparently some have no prebiotic effect on humans. This dietary fiber classification by the prebiotic categories contributes to a better understanding of these concepts in the literature, to the stimulation of the processing and consumption of foods rich in fiber and other products with prebiotic properties, and to the development of protocols and guidelines on food sources of prebiotics. (c) 2021 Elsevier Inc. All rights reserved.
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