SS, just to let you know, i am leaning toward there not being any problem as long as the two are not mixed in the same drink or in the stomach at the same time. still, for most people, a simple rule will do - Iodine internall, silver externally. a Colloidal Silver maker will pay for itself the very first time a bad burn occurs in your circle. no pain, no scarring, fast, fast healing - it cant be beat. this is why the best burn trauma centers in the world use it. but it does much, much more.