It is well known that an apple is full of vitamins, minerals and fibre. But did you also know that an apple contains about 100 million bacteria? And that they don’t make you ill, but are even very beneficial to our health? These bacteria enrich and improve our intestinal flora. Therefore, what’s desirable is having as many different bacterial species as possible. There are about 1800 difference species. On average, about 500 live in our intestines. The number of bacterial species should not be less than 200. A diverse intestinal flora is important for our immune system. If the bacteria mix, the so-called microbiome, has suffered from a long antibiotic treatment or a one-sided diet with lots of sugar and white flour, immunological diseases can occur.