A man suffering from Argyria (right). The man had been taking nose drops with silver in them for many years. An analysis of the skin showed that there were deposits of silver in his skin.
Argyria is a medical condition caused by the exposure to silver. People with this condition may have a change in skin color to pale or "greyish".
Images for kids
Colloidal silver is illegally marketed as a medicine, but it is not effective and may interfere with the functioning of some medications, such as antibiotics and thyroxine.
In Spanish: Argiria para niños