Here is a site where you can see the effects of someone using colloidal silver.
http://together.net/~rjstan/rose2.html
Yes a hand full may have turned gray, so why does not anyone site the grave yards that is full of people who died from drugs and yes the silver works great for me and others.
I actually talked to Rosemary via email back and forth. Apparently she was given medicine that had silver in it when she was young. She did not remember the name of the medicine or the dosage she took, but she did not take collodial silver and it did not cause her problem. Definately silver poisoning, but silver in high doses will do that.