I'm kind of alarmed at how not-alarming people are finding this. The idea that eating the foods we most need to eat for health will result in heavy metal poisoning via a vector about which there is no regulatory control or even awareness is a pretty big deal.
I hope someone more serious is looking into it (or has already done so) but my alarm is checked by the crack-pot flags this guy's raised for me. Most obviously that he tries to demonstrate P(A|B) by testing P(B|A) - if you don't understand basic statistics, your conclusions are suspect.
