Colon cleaning with laxatives, organic formulations or enemas may increase a person's risk of becoming dehydrated if the individual does not consume sufficient fluids. Causing diarrhea can likewise alter people's electrolyte levels. Shifting levels of salt might cause lightheadedness, and low potassium levels may trigger leg cramps or abnormal heart rhythms. Some natural cleanses have actually also been connected with liver toxicity and aplastic anemia, a rare blood condition.