Howard Mitchell; a former teacher of physics and chemistry conducted a series of experiments with colloidal silver. He found that colloidal silver has no effect on acidophilus which is the ”good bacteria” found in the stomach. He used concentrations forty times higher than what might be expected to destroy other forms of bacteria. Even in large dosages it showed that the intestinal flora (good bacteria) flourished. In fact, there is speculation that the silver ions may be beneficial in stimulating a strong growth of beneficial bacteria, therefore assisting in boosting the immune system. From time to time, some may experience diarrhea if they ingest too much colloidal silver. Once they reduce the amount being ingested, the lactobacilli counts has shown to return to normal within 12 hours without any intervention.