Colloidal silver does not discriminate between “good” and “bad” bacteria. It can potentially destroy all bacteria it comes into contact with. This is why we recommend that anyone choosing to take more than the suggested serving of silver for extended periods of time should supplement with acidophilus or live culture yogurt an hour or so afterwards. This will re-supply the digestive system with the “good” bacteria needed for optimum food digestion and nutrient absorption in the colon.