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Related Experiment Videos

Prebiotic digestion and fermentation.

J H Cummings1, G T Macfarlane, H N Englyst

  • 1Dunn Nutrition Unit, Dunn Clinical Nutrition Centre, Cambridge, United Kingdom. j.h.cummings@dundee.ac.uk

The American Journal of Clinical Nutrition
|February 7, 2001
PubMed
Summary

Prebiotics are short-chain carbohydrates that reach the cecum, selectively promoting beneficial gut bacteria. While they aid bowel function, some prebiotics can cause significant flatulence, impacting consumption.

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Area of Science:

  • Gastroenterology
  • Microbiology
  • Nutritional Science

Background:

  • Prebiotics are short-chain carbohydrates reaching the cecum.
  • Fructooligosaccharides and inulin resist digestion, reaching the large intestine.
  • New prebiotics necessitate standardized in vitro tests for efficacy.

Purpose of the Study:

  • To review the characteristics and effects of prebiotics.
  • To discuss the need for in vitro testing of novel prebiotics.
  • To highlight the impact of prebiotics on gut microflora and function.

Main Methods:

  • Review of existing scientific literature on prebiotics.
  • Analysis of in vivo and in vitro studies on prebiotic digestion and fermentation.
  • Discussion of clinical observations regarding prebiotic consumption.

Main Results:

  • Prebiotics resist digestion and reach the large intestine.
  • They selectively stimulate Bifidobacteria and Lactobacilli.
  • Fermentation produces short-chain fatty acids and hydrogen, potentially causing flatulence.
  • Prebiotics influence bowel habits and can be mildly laxative.

Conclusions:

  • Standardized in vitro tests are crucial for evaluating new prebiotics.
  • Prebiotics offer selective modulation of gut microbiota.
  • Potential side effects like severe flatulence need consideration for consumer acceptance.

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