The blue-skinned man died

Paul Karason, an American man with blue skin like the aliens on film just died, is 62 years old.

>>>Decipher the mystery of the blue skin

Karason suffers from argyria - a disease caused by an increase in silver compounds in the skin and body tissues. When that compound is exposed to light, it turns green.

In everyday life, most of us are infected with a small amount of silver because silver compounds are often found in the soil and our country is used daily. But it is worth mentioning that Mr. Karason has taken the initiative to put more silver into his body for more than a decade.

Paul Karason has pale blue skin.(Photo: Latimes)

First he drank colloidal silver - a liquid with silver particles, to fight facial dermatitis. Colloidal silver does not cure the disease but it has alleviated acid reflux and arthritis.

After that, he significantly reduced the amount of colloidal silver but his skin was still the same blue. That's because this substance usually exists in the body long before being excreted.

However, the doctors were unsure that argyria caused Karason's death. When he died, Karason was being treated for pneumonia. Before that, he also suffered from a heart attack and stroke.