Over 400 different bacteria live in our digestive tract alone - some of which are helpful to our system, and some of which are not. The good ones are known as Micro-Flora, and naturally occur in our body. The bad ones tend to arrive through food, age, disease and other environmental sources. NEW Read our article Digest this! With Acidophilus Plus+When our digestive system starts to malfunction due to illness, age, stress or even by taking prescription medicine (such as antibiotics), the good bacteria can be over-run by bad bacteria. By maintaining the balance of good and bad micro-organisms, our digestive system can