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Health, Explained · 45 sec

Dietary fiber

Understand the mechanism before acting on health claims.

  1. The useful idea

    Dietary fiber, fibre, or roughage is the portion of plant-derived food that cannot be completely broken down by human digestive enzymes.

  2. How it works

    Dietary fibers are diverse in chemical composition and can be grouped generally by their solubility, viscosity and fermentability which affect how fibers are processed in the body.

  3. Why it matters

    Dietary fiber has two main subtypes: soluble fiber and insoluble fiber which are components of plant-based foods such as legumes, whole grains, cereals, vegetables, fruits, nuts, and seeds.

Use Dietary fiber to ask clearer questions; personal health decisions still belong with a qualified professional.

Use Dietary fiber to ask clearer questions; personal health decisions still belong with a qualified professional.

Test your recall

Which idea belongs to the explanation of Dietary fiber?

  • The useful idea — correct
  • How it works
  • Why it matters

Dietary fiber, fibre, or roughage is the portion of plant-derived food that cannot be completely broken down by human digestive enzymes.

EvergreenLast verified 2026-07-19

General education only — not medical advice, diagnosis, or treatment.

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