More than a year after his first appearance, The Today Show revisited Paul Karason, who suffered an extremely rare side effect when he took colloidal silver to treat a skin condition: His skin turned blue. Not a light shade of azure or a sky blue—we're talking full-on Smurf. While the 58-year-old isn't exactly the picture of health—he was recently treated for a blocked artery and prostate cancer—a recent physical indicated that his heart, lungs, kidney and liver were all healthy. Watch the full interview here:

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