I'm not here to put the fear into you, just found all of this rather interesting and informative.
Here are all their tea related articles. 129 of them for some light Christmas reading...
http://www.sciencedirect.com/science?_o ... d83d3f20d0
Very interesting stuff.
It's interesting that the CTC tea had higher Chromium content, thanks for sharing. All research seems to point towards the same general trend, which is that mass-produced food and drink has health risks.