Unlike fats, proteins and carbohydrates, your body is not able to digest or absorb dietary fiber. Soluble fiber dissolves in water and forms a gel-like substance while passing through your gastrointestinal system. Found in a variety of foods, you can take soluble fiber in supplement form to help lower blood cholesterol, maintain glucose levels, and treat constipation.
Psyllium
Psyllium is a bulk-forming laxative that is used to treat high cholesterol and constipation. According to PubMed.gov, it absorbs liquids in your intestines until they form an stool that is easy to eliminate. Available in powder, capsule and even liquid form, you can take psyllium up to three times daily. To prevent constipation, it is important to take psyllium with plenty of fluids. It is best to incorporate it into a high-fiber diet.
Polycarbophil
Marketed by brand names like Fibercon or Mitrolan, polycorbophil is an over-the-counter soluble fiber that also absorbs intestinal fluids to form stools that can pass easily. In addition to constipation relief, Jackson Siegelbaum Gastroenterology says that polycarbophil promotes bowel regularity and is helpful for diverticulitis and irritable bowel syndrome, or IBS. It can take up to three days to see results after taking polycarbophil.
Methylcellulose
Created from the cell wall of plants, methylcellulose is a soluble dietary fiber that does not cause gas. According to Vitamins-Supplements.org, it is also helpful for IBS, diverticulitis and constipation. While a bowel movement usually occurs within 12 to 24 hours, the American Cancer Society says it may take as long as three days for some people to pass their stools.
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