Karason was fair skinned and freckled until the early 1990s. Karason started taking colloidal silver after his friend developed petroleum poisoning. Karason started taking it for sinusitis, dermatitis, acid reflux, and other issues. This caused him to develop argyria, leading to his skin turning blue In 2008, Karason first gained prominence after appearing on Today. He claimed it cured his acid reflux and arthritis.
Source: https://en.wikipedia.org/wiki/Paul_Karason
