The blue skin cosmetic condition known as argyria is really quite rare and comes from very large quantities of crude silver. Mostly, it is a condition that mainstream medicine and their FDA lapdogs have latched onto to try to scare people away from a safer, more effective and much less expensive competitor to FDA approved products.
I have believed in acupuncture and Oriental medicine as a matter of faith for some time - after all, they did have about a 6000 year head start on western medicine!
You are right - belief has much to do with success. And in no way is it my intention to shake anyone's belief in silver - homemade or otherwise. It is one of the world's miracles to me.