I take colloidal silver and colloidal gold every day to help me heal my long term health difficulties.
Argyria is only a risk if you take low quality CS with a PPM over 500 in large doses.
Paul Karason did it to himself on purpose, and would literally have to chug mason jars of low quality CS in order to turn blue like that, if you are using it responsibly and with discernment it is a great benefit to many life forms.

Its a shame that I see people in the comments being scared away from this life affirming tool that every household should be familiar with.
I buy my CS and Colloidal Gold (an even better repairing substance) from
www.utopiasilver.com

Of course big pharma and their media will scare you away from this that if widely adopted would greatly impact their bottom line profit

All the best
-B