About 1014 live microorganisms participating in a metabolism are constantly registered in intestines. Byproducts and cellular elements of these microorganisms are capable to do harm to health. Such phenomenon is called endointoxication, and it became one more disease to which enough attention wasn’t paid recently. The liver is especially subject to harmful effects as its direct appointment namely to delete toxic substances. Organism’s poisoning occurs when the intestinal epithelium is damaged, immunity is reduced or removal of slags is slowed down.