Colloidal silver is a product marketed by naturapaths. Supposedly it kills 650 bacteria, is nontoxic and restores your night vision. That is what I know about the stuff. A web search produced organic colloidal silver, clay mineral colloidal silver, super colloidal silver and kits for making your own colloidal silver. It's a popular product along with freeze dried lentils, surplus canadian gas masks and G.I. surgical pocket kits. My acupuncturist reccomends buying a filter ( seriously) Beachdoc? Trustbox?