The intestine represents our largest area of contact with the environment. With a surface of 400 to 500 m², it is colonized by 10¹⁵ bacteria that pertain to our body’s own intestinal flora. The major portion of the so-called bowel-associated immune system is located in the intestines.

A microbiological stool analysis is carried out in order to examine the functional efficiency of the intestinal flora, gall bladder and pancreas.