Zarathushtra: "With an open mind, seek and listen to all the highest ideals. Consider the most enlightened thoughts. Then choose your path, person by person, each for oneself."

Argyria is the graying of the skin. Colloidal silver can be produced either chemically or electrically. Argyria is a result of ingesting high doses of chemically produced colloidal silver. There has never been a case of Argyria caused by electrically produced colloidal silver.
Please be clear about this, electrically produced silver colloid does not cause Argyria. Hundreds of thousands of people worldwide have been taking electrically produced colloidal silver for decades. The concern is with silver salts, not colloidal silver.