Chitosan is a form of dietary fiber that is most commonly derived from shellfish. Like dietary fiber, chitosan is not digestible but is believed to benefit the gastrointestinal tract.
Studies have shown that taken with ascorbic acid (vitamin C), it forms a gel in the intestines which binds to fat and prevents absorption, allowing these fats to be eliminated from the body.
Scientists believe that this ability is linked to chitosan’s strong positive magnetic charge, which enables it to easily bind to fat, which is negatively charged. Chitosan has other benefits as well; for example, it has been shown to reduce plasma cholesterol.