Yes, the bacterial strains used in Nature Science products survive in low pH gastric juice. As for the effect of “digesting” the bacteria in the stomach and their ability to pass in active form to the intestines, it all depends on the properties of the strain in question and its resistance to gastric acid and bile salts – we have conducted appropriate tests and both low pH in the stomach and bile salts do not deactivate our bacteria – this is confirmed by the research of the Polish Academy of Sciences.