Why isn't fiber digested?

Answer 1

Digestion in body takes place with the help of some speical compounds known as enzymes and by some digestive juices. Fibers are not digestible in human as they did not contian any enzyme to digest it as compare to Rumen

Answer 2

*New answer: It is not digested as it cannot be digested by the enzymes in the small intestine and therefore is not absorbed in the small intestine. However, it adds bulk to your undigested food, helping with egestion (not to be confused with excretion). If you do not drink enough water or eat enough vegetables (contain fibre), you will have constipation as the undigested food travels too slowly in your large intestine, so it will eventually dry up and be stuck there as peristalsis is not strong enough to push it out of your large intestine.

Answer 3

I believe that fiber can not be digested because we do not have the correct enzymes to break it down.

Answer 4

Because humans don't have the enzymes required to digest it. Actually, that's part of the dietary definition of fiber. If you could digest it, it wouldn't be fiber.