[decimon]

Heavy eyelid ping.

[zadox]

The central point of the article:

Contrary to widely held belief that lead is harmful, the team, using analytical chemistry, determined that "in very low doses lead does not kill cells." Instead, it produces a molecule -- nitric oxide -- that activates the immune defence system which beats back bacteria in case of eye infection.

I'm a bit skeptical, but hummmm.... might be...