It is estimated that over 400 different species of bacteria live in the digestive tract and in various areas of it, such as the stomach, jejunum, duodenum, etc.

The balance of the flora is of exceptional importance for the health of the intestines and the protection of the gastrointestinal system from pathogenic organisms.

The most important and friendly bacteria to the body are:

• Lactobacillus Acidophilus: The most important friendly "resident" of the small intestine. It produces the enzyme lactase, which aids in the digestion and absorption of nutrients.
• Bifidobacterium Bifidum: The most friendly bacteria of the large intestine, which prevent the colonization of hostile organisms.

Lactobacilli produce significant amounts of lactic, formic, and acetic acids, which create an acidic environment that prevents the growth of pathogenic organisms.

Acidolin, one of the main substances of Acidophilus, has strong antibiotic properties.

Bifidus bacteria contribute to the progressive weight gain of infants by retaining nitrogen.

The production of vitamin B in small quantities by Bifidus bacteria enhances the nutritional value of the digestive system.