I am taking a shot glass full of 20 ppm colloidal silver (true colloidal silver, not clear ionic silver). This is to kill candida and fungus in addition to herbs.I think it's amazing but I have a question for anyone who knows colloidal silver chemistry. The silver causes a brief stomach ache about 20 minutes after I digest it, when it hits my stomach. With food or without food. Any ideas why? Is this the candida being killed off in the gut? Nonetheless, I love it and will continue. Just curious about the stomach ache.