What is the function of insoluble fiber in the digestive system?

Insoluble fiber plays a crucial role in the digestive system primarily by adding bulk to stool and assisting in the movement of food through the digestive tract. This type of fiber is not soluble in water, which is why it does not dissolve but instead absorbs water, increasing stool mass. This action helps to promote regular bowel movements and prevents constipation by facilitating the passage of waste through the intestines.

Insoluble fiber also supports gut health by aiding in the maintenance of a healthy digestive system. It contributes to the sensation of fullness, which can help regulate appetite, but its primary function is to improve digestive efficiency rather than prolonging the feeling of emptiness. In summary, insoluble fiber’s ability to draw water into the intestine and increase stool bulk is essential for promoting effective digestion and maintaining regularity.