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Related Experiment Videos

Fermentable carbohydrate and digestive nitrogen excretion.

H Younes1, J C Alphonse, M Hadj-Abdelkader

  • 1Service de Néphrologie, Pr. DETEIX, Unité d'Hémodialyse Adulte, Hôtel Dieu, CHU Clermont-Ferrand, France. hassanyounes@yahoo.fr

Journal of Renal Nutrition : the Official Journal of the Council on Renal Nutrition of the National Kidney Foundation
|July 24, 2001
PubMed
Summary

Adding fermentable carbohydrates like fructooligosaccharides (FOS) to a low-protein diet enhances nitrogen excretion via the digestive tract. This strategy may help reduce the burden on kidneys in renal failure patients.

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Area of Science:

  • Nephrology
  • Gastroenterology
  • Nutritional Science

Background:

  • Dietary protein restriction lowers urea and may slow renal failure progression.
  • Fermentable carbohydrates might enhance nitrogen excretion through the digestive tract.

Purpose of the Study:

  • To investigate if fermentable carbohydrates enhance nitrogen metabolism during protein restriction in a rat model of renal failure.

Main Methods:

  • Rats with 70% renal mass ablation were fed diets with varying fructooligosaccharide (FOS) (0% or 10%) and protein (10% or 18%) content.
  • Nitrogen metabolism was compared between uremic and control rats.

Main Results:

  • Fructooligosaccharides (FOS) increased cecal size, urea uptake, and decreased plasma urea by 30%.

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  • Fecal nitrogen excretion nearly doubled in rats on low-protein, FOS-enriched diets.
  • Uremic rats on low-protein diets with FOS showed over 65% reduction in urinary nitrogen excretion.

    • Conclusions:

    • Combining fermentable carbohydrates (FOS) with low-protein diets increases digestive nitrogen excretion.
    • This dietary approach may alleviate renal function burden in renal failure.