Colloidal Silver Toxicity Study

Purest Colloids, Inc. hired one of the leading independent laboratories in the U.S. to do a toxicology study on our colloidal silver product, Mesosilver. The test, called an LD-50 test, was performed in accordance with the guidelines of the Federal Hazardous Substances Act (FHSA) Regulations, 16 CFR 1500. In the test work, the Mesosilver was given to a number of both male and female test animals. The amount of Mesosilver given to the animals was 5g/kg of 20 ppm colloid, or the equivalent of a 200-pound man taking 30 tablespoons at one time (the normal adult dosage is between one teaspoon and four tablespoons/day). As a result of the test work, the independent laboratory made the following conclusion, “Under the conditions of this study, there was no mortality or significant evidence of toxicity observed in the rats. The test article Mesosilver would not be considered toxic at a dose of 5g/kg by oral route in the rat.”

For more detailed information concerning silver toxicity, see the EPA Silver Toxicity Study.