Chitosan is a natural fiber derived from the shells of shrimp and other shellfish. It binds with fat in the food you eat Beneficial Effectsing it from being absorbed as it passes through the body. Because Chitosan cannot be digested or absorbed, it has no caloric value. Natural Balance uses LipoSan Ultra™ brand Chitosan which is ultra fast-acting binding almost three times more fat than other Chitosan products. Taken before meals, Chitosan is a revolutionary advance in weight control for both men and women