Nature's Answer offering the Finest Supplements from our family to yours, since 1972. Colloidal silver produced in our FAMILY OWNED MANUFACTURING FACILITY. Nature's Answer Colloidal Silver features a concentration of 10 ppm (parts per million) of high quality elemental colloidal silver, which offers the advantage of ultra small particle size to support easy absorption and excretion. Pure, clean formula featuring only high quality elemental colloidal silver and purified water.