Natural Path Silver Wings - Colloidal Silver 500 Ppm - 16 fl. oz. (480 ml) Natural Path Silver Wings Colloidal Silver 500 ppm is 99.9% silver and 0.1% casein. Natural Path/Silver Wings guarantees this to be colloid (0.01-0.001 microns) with the highest percent of the silver particles at 0.002 micr
