Probiotic lactic acid bacteria are living micro-organisms that exert a positive influence on our intestinal flora. They protect against disease-causing germs and allow a smooth digestion of the intestine. The name probiotic himself comes from the Greek and means "for life". To be added to the probiotic lactic acid cultures, the bacteria must have certain properties. Above all they must be resistant to stomach and bile acids on their way through the digestive tract, so they can get in the large intestine and develop their positive effect here. In addition, probiotic cultures must be naturally safe. Lacto- and Bifido bacteria belong to the normal intestinal flora of humans. Streptococcus thermophilus is a very long known germ, which serves the people for many centuries for the production of fermented dairy products. Probiotics help to restore a balanced intestinal flora. Probiotics have a clever strategy. Turn milk sugar into lactic acid. The result is a slightly acidic environment that kills many pathogenic bacteria in the intestine. Also they proliferate and leave no space therefore harmful intestinal inhabitants and eat them. So to speak, weakened by the superior numbers of beneficial bacteria harmful bacteria or switched off. Bifidobacteria produce not only lactic acid and acetic acid. You will therefore probably have an especially strong ability to inhibit the growth of other bacteria. Through a combination of different germs, the effect is extended over a wider area of the intestine. Probiotics contribute to reinforce the defences, lower cholesterol levels and reduce the risk of colon cancer. It is particularly important to rebuild the own intestinal flora after treatment with antibiotics.