While many lactic bacteria strains cannot withstand the passage through the stomach’s acidic pH fluctuations, laboratory tests show a 100% survival rate for all microorganisms included inWhile many lactic bacteria strains cannot withstand the passage through the stomach’s acidic pH fluctuations, laboratory tests show a 100% survivalMatol’s Probiotics after 3 hours in a gastric solution at pH3/pH4 at 37^oC - the human body temperature. Lactic bacteria gastric resistance is the main factor to control in order to maximize potency and probiotic activity. This is our Gastric Guard Guarantee.