Fiber is a carbohydrate that the enzymes in your body cannot break down. It is made of two distinct types: soluble and insoluble.
In your digestive tract, soluble fiber absorbs water, which adds bulk to stool and slows down digestion. It also binds with cholesterol and eliminates it in your stool.
Insoluble fiber remains unchanged throughout digestion and helps increase the time it takes for food to move through your digestive tract.