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Exploring other dietary fiber types

Dietary fibers differ in their structure, properties and how they behave in the digestive system. Some are fermented by the gut microbiota, while others contribute primarily to stool bulk and bowel regularity. Their physiological effects can therefore vary considerably. Understanding these differences helps explain why a diverse range of fiber-rich foods is an important part of a balanced diet and why individual fibers may serve different nutritional and functional purposes.

From naturally occurring plant fibers to processed forms, this section provides an overview of additional dietary fiber types. It offers clear and concise information about different fiber categories, their sources and related health benefits.

Barley plants growing in a field

Beta-glucans

Beta-glucans are dietary fibers found naturally in barley and oats. They are known for their cholesterol-lowering effects and contribution to heart health.

Psyllium powder being stirred into a drink

Psyllium

Psyllium is a highly viscous fiber from the husks of psyllium seeds, known for its bulking and gel-forming properties.

Birch tree trunk with green leaves

Cellulose

Cellulose is an insoluble, plant-based dietary fiber that supports stool bulk and normal bowel regularity.

Apple and orange with leaves

Pectin

Pectin is a soluble dietary fiber naturally found in fruits like apples and citrus, widely known for its gelling properties in food.

Green bananas with starch powder in a bowl

Resistant starch

Resistant starch refers to starch fractions that are not digested in the small intestine. Different types of resistant starch vary in structure and origin, contributing to their physiological behaviour.

White powder with laboratory glassware and a bottle

Synthetic fibers

Resistant dextrins, such as soluble corn fiber and polydextrose, are synthetically produced soluble fibers created from starch and glucose through controlled chemical processes.