What type of dietary fiber cannot be digested and is found in plant cell walls?

Cellulose is a type of dietary fiber that is a crucial component of plant cell walls. It is a polysaccharide made up of long chains of glucose molecules linked together in a way that humans and many animals lack the enzymes to digest. This indigestible fiber plays a significant role in providing structural support to plants, helping them maintain their shape and integrity.

When consumed, cellulose contributes to dietary fiber intake, promoting digestive health by adding bulk to stool and facilitating regular bowel movements. While other types of dietary fiber, such as soluble fiber and pectin, can be partially fermented or digested by humans, cellulose remains largely intact as it moves through the digestive system.

Lignin is a complex organic polymer found in the cell walls of some plants, but it is not a carbohydrate and functions differently from cellulose. Understanding cellulose’s role in nutrition emphasizes the importance of high-fiber foods in supporting digestive health and overall well-being.