Prébiotique

The prebiotic are generally Oligosaccharide S or Polysaccharide S with short chain roughly made up from two to twenty units of Sucre. They escape digestion in the Small intestine and are potential substrates for the Hydrolyze and fermentation by the intestinal Bactérie S.

The prébiotiques ones must act like selective substrate of one or a restricted number of beneficial bacteria which reside in the Côlon and stimulate the growth of it. The bifidobacteries and the Lactobacille S are the micro-organisms of the intestinal microbiote (intestinal Flora) most frequently targeted.

Sources of prebiotic

The prébiotiques ones can are found naturally in the fruits and vegetables, and are extractable (for example Inuline). Others, are commercially produced by the hydrolysis of polysaccharides (for example of the fructo-oligosaccharides or oligofructoses) or are synthesized by subjecting disaccharides such as lactose to the action of enzymes like lactases with transférases activities to produce the transones or by a chemical reaction of isomerization which gives the lactulose. Currently, the transones and the fructanes of the inulin type are those of which the effects prebiotic are recognized.

Effects

  • Increase in the absorption of minerals (in particular of the Calcium and the Magnesium) in the Colon and reduction losses of bone tissues
  • Lowering of the rates of blood Lipid S (discussed)
  • Effect on the immunizing functions
  • protective Effect against the development of the Cancer of the colon
Administration of inulin, oligofructose and trans-galactooligosaccharides conduit to a selective increase in the fecal concentration of the populations of bifidobacteries. The bifidobacteries have relatively high quantities of ß-fructosidase which is specific to hydrolize the bonds ß1-2 fructanes; the lactobacilles can also ferment the fructo-oligosaccharides (FOS). With the difference of other nondigestible sugars as the oligosaccharides of soya which are hydrolized by a large variety of intestinal bacteria, the FOS with short chain are fermented in vitro by a limited range of micro-organisms which include the majority of the species of Bifidobacterium.

A prebiotic direct consequence of the effect is an improvement of the intestinal practices. When the prébiotiques ones become available in the colon, the fecal bacterial mass increases, as well as the content of the saddles interstitial water and/or related to the bacteria. The prébiotiques ones improve consistency of the saddles and increase the frequency of expulsion at the slightly constipés subjects.

See too

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