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Related Experiment Videos

What is a high fiber diet?

T M Wolever1, D J Jenkins

  • 1Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Ontario, Canada.

Advances in Experimental Medicine and Biology
|January 1, 1997
PubMed
Summary

Defining a high fiber diet remains challenging, with global intakes varying significantly. Current recommendations may conflict with promoting unrefined foods and adequate fiber intake, suggesting a need for revised guidelines.

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Area of Science:

  • Nutrition Science
  • Dietary Fiber Research
  • Public Health Nutrition

Background:

  • Global dietary fiber intake varies widely, from under 20g to over 80g daily.
  • The primary sources of dietary fiber differ across populations, with vegetables being a major contributor in high-fiber diets.
  • Existing dietary guidelines for fat and fiber intake may be inconsistent with recommendations for high-fiber diets, particularly for individuals with higher caloric needs.

Purpose of the Study:

  • To examine the definition and current recommendations for high fiber diets.
  • To analyze the composition of diets with high fiber intake, referencing historical and experimental models.
  • To propose revised dietary fiber intake recommendations to support the consumption of unrefined foods.

Main Methods:

  • Literature review of international dietary fiber intakes and food sources.
  • Analysis of existing dietary guidelines and their compatibility with high fiber intake.
  • Comparison of fiber content in omnivorous and vegetarian diets with varying food choices.

Main Results:

  • No universally recognized definition of a high fiber diet exists.
  • Vegetables are a significant source of fiber, especially in diets exceeding 50g daily.
  • Current guidelines (20-35g/day) may necessitate low-fiber food choices for individuals consuming over 2400 Kcal.

Conclusions:

  • Current dietary guidelines may not adequately support high fiber intake.
  • A minimum intake of 15-20g of dietary fiber per 1000 Kcal is proposed for promoting unrefined food consumption.
  • Revised recommendations are needed to align with promoting healthier, high-fiber diets.

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