Dysbiosis can be caused by different pathologies, such as allergic diseases, obesity, diabetis. In these cases the microbiota changes, presenting a different proportion of microorganisms. To reestablish a balanced proportion, there are different tool: diet, for example, but also the use of some microbiota biomodulators. Probiotics are able to modulate the diversity of microbiota, by changing the immunological stimulation and the licky gut.