Definition: Insoluble fiber is what we usually think of when we think “fiber” or “roughage”. Wheat bran, vegetables, nuts, and seeds are examples of sources of insoluble fiber. It is tough, and doesn’t easily break down. Insoluble fiber tends to increase the “speed of transit” through our digestive systems, and increases regularity of bowel movements.
Pronunciation: in SOL yoo bel
Common Misspellings: insoluable fiber
Examples: Cellulose, the main constituent of plant cell walls, is the principle type of insoluble dietary fiber.
