Collodial silver is antibiotic, antiseptic, and costs pennies to make. We have been using it for three years and we never get sick. And no, we didnt turn blue. Always use distilled water and test for zero impurities. http://Www.economysilvergenerator.com is where we bought ours. We use on any cuts, scrapes, etc. and take a Tbsp orally every day of 10 ppm silver.