

According to FAO/ WHO definition, probiotics are live microorganisms which when administered in adequate amounts confer a health benefit on the host.
Probiotics are administered only orally or are introduced directly to certain organ e.g. the vagina.
Due to marketing in the world of more and more preparations declared by manufacturers as probiotics, WHO and FAO determined the criteria, which should be met by certain microorganisms in order to call containing it preparation “probiotic”. Among others, the exact name of genus and strain of bacteria should be present together with its number, and also in vitro, in vivo, and clinical examinations should be carried out, confirming beneficial effect on host organism. All these strains should be characterised by genetic stability, lack of plasmid transmission, lack of ability for biosynthesis of bacterial toxins, mutagens and carcinogens, lack of allergic reactions.