A laxative, psyllium husk, works by increasing the weight of your feces, which helps your intestines to pass the stools through your digestive system, relieving constipation. The fiber in psyllium has many health benefits for everyone, but it is especially good for people who struggle with constipation. Taking a fiber supplement every day can help you maintain a healthy digestive system and prevent constipation from developing. Fiber supplements are used to treat constipation because they provide much-needed bulk to your stool while reducing your risk of experiencing painful bowel movements. Fiber has many health benefits for everyone, but it is especially good for people who struggle with constipation. Fiber's water-absorbing qualities help control constipation by allowing all of the solid material that enters your colon to be absorbed into the blood stream instead of being left behind as dry waste. This excess material would otherwise cause irritation and blockage in your colon. Fiber also improves digestion by providing food for the bacteria in your gut. Without enough fiber, these bacteria will die out and cause diarrhea. Too much fiber can cause problems with digestion as well, so finding a balance is important. People who suffer from chronic constipation should consider adding fiber to their diets in some form.