Scientists have put forward a detailed biochemical model to explain argyria, a condition which turns sufferers’ skin a distressing blue colour. It is caused by chronic exposure to silver and although the new work won’t lead to a cure it does provide new insights into the health risks associated with silver nanoparticles that are now ubiquitous in modern life.
http://www.rsc.org/chemistryworld/2012/11/chemistry-blue-man-argyria-colloidal-silver
Azócar group Lab 