In some respects, chitosan is superior to plant fibers in that it forms a gel that is both more fluid and more stable. Imagine a fiber that can do all of these things and binds fats in the process. Chitosan is just such a substance. Chitosan is a positively charged fiber that binds to negatively charged fatty acids. A fiber that attracts fat is unique to say the least.
Most fibers are hydrophilic which means they repel fat and attract water.
Psyllium, for example, is used for its bulk forming action. This type of fiber absorbs water and is easily passed through the intestine, helping to maintain a normal stool. Chitosan is different. While it possesses many of the same benefits as plant fibers like psyllium, it can inactivate fats. For this reason, combining chitosan with fibers like psyllium is highly recommended and can only serve to further support the weight loss process.