83% of Omni-Biotic probiotics arrive in the large intestine alive and active, compared to an average of 7% in other probiotic capsule brands. When the Omni-Biotic powder is dissolved in water prior to intake, the freeze-dried bacteria rehydrate and metabolize the prebiotic nutrients included in the mix. This makes the probiotics strong for the passage through the acidic environment of the stomach and small intestine. 30 sachets.