wtf? how the fack would you know that?
There was an article posted a year or two ago listing and comparing heavy metal content of multiple brands of protein powders. I had a link to the article and a JPEG of the chart saved somewhere, but I believe both were stored on my old computer that cooked about 18 months ago.
If I can find it, I'll post it up. Somebody started a thread about it here a while back.