How does fiber help relieve constipation?

Pulls H20 into bowel: Fiber works like a sponge to pull water into the bowel-makes for a softer, bulkier, easier to pass stool. If there is too much fluid in the bowel, it can work like a sponge to soak up the fluid, and make a softer, more formed stool. Not all cases or causes of constipation are helped by fiber, so check with your doc..

Softens stool: Fiber causes excess water to be held into waste products or stool. Thus stool is sifter and bulkier. The bulkier the stool, the easier it is to push out.