Dietary fiber refers to plant cell wall components that are not digestible by human or other mammalian digestive enzymes.
Dietary fiber requirement can be meet by adopting a diet that incorporates plant origin foods including fruits, vegetables and grains.
It is a common knowledge that daily intake of fiber is a requirement for a healthy lifestyle. Below is the daily Dietary Recommended Allowance (RDA) of dietary fiber for all life stage groups .
Table: Dietary Reference Intakes (DRIs) of fiber: daily recommended intakes of dietary fiber for children and adults.
|Age, gender, life stage group||RDA Fiber (grams/day)|
|0–6 mo||Not determined|
|7–12 mo||Not determined|
|> 70 years||30|
|> 70 years||21|
Note: Daily Reference Intakes (DRI) has been developed, since 1996 by the Food and Nutrition Board, Commission on Life Sciences, National Research Council, to replace the Recommended Dietary Allowance (RDA).
Dietary fiber related links:
Total dietary fiber, soluble fiber, insoluble fiber content of foods
Definitions of dietary fiber food.
List of high fiber foods: vegetables and fruits
List of low fiber foods
Dietary Reference Intakes source:
Institute of Medicine. 2005. Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids. National Academy Press. (Food and Nutrition Board, Institute of Medicine, National Academies).