Health is important for everyone. A diet rich in fiber can reduce the risk of many diseases. On the other hand, medicine today can often help when diseases are present, and the new possibilities offered by science to take a look inside the intestine and better recognize the bacteria that live there are particularly interesting. A scientist from the Max Rubner Institute and specialists in gastrointestinal diseases from the Karlsruhe Municipal Hospital provide exciting insights into the gastrointestinal world and answer questions