What is it called when your skin turns permanently blue? Well, doctors call it argyria, which by medical definition is a "blue-grey discoloration of the skin and mucus membrane. The condition is permanent and there is no known cure for it.

The condition made its way into the main-stream consciousness in 2008 when Paul Karason appeared on The Today Show to show the world what had happened to him.

Karason did this to himself by ingesting colloidal silver regularly. Colloidal silver is silver ions dispersed in water, and Karason started ingesting it after seeing a demonstration of how an old daisy was brought back to life after being immersed in it. Karason hoped that ingesting the same liquid would help him with his long term health prospects. Unfortunately Karason passed away from a heart-attack in 2011 at the age of 62.

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