Probiotic foods consist of a few of the advantageous bacteria naturally found in the gut of humans. The bacteria are not naturally present in the food. They form throughout the fermentation process.
Examples of fermented food including live active bacterial cultures include Natto, Miso and Tempeh, all which are originated from fermented soybeans. Korean Kimchi and the sauerkraut of European origin are made up of fermented or pickled cabbage. They consist of a various type of germs.
The advantage of the particular food varies depending upon the type of germs it consists of. There are many questions about whether or not consumption of probiotics of any kind will really increase the quantity of helpful germs present in the gut. It is known that gastric acid will eliminate much of the live germs. So, whether the germs can discover a spot to grow in the colon is unidentified.