Whole Psyllium Husks by NOW is a great way to improve your daily fiber intake. Fiber is a non-soluble carbohydrate. While the body doesn't use fiber directly. it does aid the digestive process. Fiber supplementation has been shown to improve bowel movements and may reduce the risk of colon cancer. In some ways. fiber is a natural cleanser. It helps to ensure that food waste doesn't remain in the GI tract for longer than it should.