Having watched shows like 20/20 where they show you the bacteria on common things, like makeup, I'd be more worried about the bacteria on the product than the product itself. The biggies like lead, arsenic & mercury are no longer found in most comestics today.
ha...I just typed that then decided to quickly search and the first thing I came across:
Arsenic, lead and mercury discovered in Canadian cosmetics: study | News | National Post
so looks like I'm wrong. yikes
