Absorption in the gastrointestinal tract is a very important biological process by which the body is provided with the necessary nutrients. Absorption reflects the specificity of metabolism, depends on the course of physiological processes and is regulated by neurohumoral factors. Digestion occurs mainly in the small intestine. It is carried out with the participation of a number of enzymes produced by the pancreas, intestine, and liver.

Diphyllobothriosis is a widespread human infestation, and in a number of endemic areas the incidence rate exceeds 30%. Diphyllobothriosis clinic is dominated by symptoms of gastrointestinal tract lesions, the activity of which is significantly affected by its microflora.