Proprietary Fiber Blend Featuring All-Natural Marine Fiber Chitosan is an all-natural marine fiber derived from shellfish. This unique formula combines chitosan with a proprietary blend of glucomannan, psyllium seed husks, fructooligosaccharides and inulin. Fiber helps food pass through the intestines faster, serves as a bulk forming agent and encourages colon health by helping to speed food through the digestive system.* When consumed with food or liquid, it expands to give a sense of fullness and can help reduce the amount of food you eat.* Fiber also plays an important role in cleaning the digestive system.* In addition, FOS and unulin have been added to provide digestive support.* Add GNC Chitosan with Glucomannan to your daily nutritional program.