The digestive system, and especially the intestine, is colonised by a huge number of microorganisms that together constitute its bacterial flora. Some medicines, such as antibiotics, may alter the balance of intestinal flora causing diarrhoea. Physical and mental stress can also have the same effect, for example, in situations where the body is subjected to changes of season and temperature, to cold and damp, or vice versa to heat and to sun exposure.

Compromised bacterial flora is unable to counteract the proliferation of harmful bacteria. There is consequently an increased risk of inflammation, accompanied by diarrhoea. It therefore becomes very important to take live probiotic supplements able to adhere to the intestinal epithelium to restore the quantity and quality of the intestinal flora.