In the U.S., its main claim is a weight loss product. Chitosan attaches to fat in the stomach before it is metabolized. The Chitosan traps the fat and prevents its absorption in the digestive tract. The fat binds to the Chitosan fiber and becomes a large mass which the body cannot absorb. This large mass is then eliminated from the body, neutralizing fat after it enters the stomach sparing the body from having to deal with the fat.
Chitosan fiber differs from other fibers in that it possesses a positive ionic charge.
This positive charge gives Chitosan the ability to chemically bond with negatively charged lipids, fats and bile acids. Chitosan has been used for over two decades without side effects. Another benefit of Chitosan is that it inhibits bad cholesterol and boosts good cholesterol. Chitosan acts as an antacid and is beneficial in the healing of ulcers and lesions. Chitosan also has antibacterial properties.