Boas Comidas

Glossário Culinário

Dietary Fiber

Conceito

Também chamado de
dietary fiber; food fiber

Dietary fiber is the part of plant-based foods the body does not fully digest, found in fruits, vegetables, legumes, oats and whole-grain products. In the kitchen, it shows up whenever the dish includes peels, whole grains, seeds and vegetables: it boosts fullness and helps bowel function when combined with good hydration.

Characteristics

There are two groups: soluble fiber, found in oats, beans, lentils, apples and citrus fruits, which forms a kind of gel in cooking and makes porridges and broths creamier; and insoluble fiber, found in brans, whole-wheat breads, fruit peels and vegetables, which adds texture and crunch. Whole foods keep more fiber than refined versions, and simple cooking, steamed or with little water, preserves much of it.

  • Soluble: oats, beans, lentils, apples and citrus; they add creaminess.
  • Insoluble: brans, whole grains, peels and vegetables; they add texture.
  • With water: hydration through the day goes with fiber intake.
  • Variety pays: mixing different sources covers both groups.

Uses in the kitchen

Adding fiber is simple: swap part of the white flour for oats or whole wheat in cakes and breads, choose brown rice for some meals, keep beans and lentils in the weekly menu and add salads, unpeeled fruit and seeds like chia and flaxseed to yogurts and smoothies. Oatmeal for breakfast, whole-wheat bread for snacks and vegetables at lunch spread fiber through the day.

Substitutions

Swap white rice for brown a few times a week, wheat flour for oats in simple pancakes and cakes, white bread for whole wheat, strained juice for whole fresh fruit with pulp and peel, and ultra-processed snacks for a mix of nuts, plain popcorn or fruit. Small steady swaps work better than drastic one-time changes.

Fun facts

Oats became the symbol of fiber for a visible reason: as they cook, they thicken porridge, an effect of the soluble fiber also found in beans and lentils. Another curious detail is that much of the fiber in apples and pears sits near the peel, so eating them well washed, with peel, uses more than peeling. In the everyday beans-and-rice plate, fiber is already there without anyone noticing.

Recipes with dietary fiber

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