Why can you not completely digest vegetable fibers?

The human body is not able to produce the necessary enzymes to break down the chemical bonds in vegetable fibers. These fibers, such as cellulose, lignin, and pectin, are found in the cell walls of plants and provide structural support. As a result, they are indigestible by humans and pass through the digestive system mostly intact.

While vegetable fibers cannot be fully digested, they still provide important benefits for human health. They help add bulk to the stool and promote regular bowel movements, reducing the risk of constipation and diverticular disease. Additionally, vegetable fibers can help lower cholesterol levels, regulate blood sugar levels, and reduce the risk of certain chronic diseases, such as heart disease and certain types of cancer.