Colloidal Silver is a solution of extremely fine sub microscopic particles (.015 - .005 microns) of pure silver suspended in water by a positive electric charge on each particle. The particles remain suspended throughout the solution because these positive-charged particles repel each other with a greater force than gravity can exert upon. Silver is an exceptional metal in that it is non-toxic to the human body. How it Works CSP's "Silver Sol-Defense" (Colloidal Silver) acts as a stimulant and disables an enzyme that helps promote actions inside cells. Disabling the enzyme ensures the destruction of pathogens and will stop them from using the body's own cells as vehicles for replication.