That is crazy!! Did the pathology report or doctor's report actually say that the grey color intestine was from Mercury poisoning? Or did it just say that it was grey and could indicate Mercury poisoning? Either way I can't believe that they didn't tell you this so many years ago. Nobody told you guys that his intestines were grey in color? What did they tell you was the cause of the Chrohn's disease? Genetics or something? The fact that we put our trust in the health care system is scary sometimes.
Anyways, I think I will be booking an appointment with a biological dentist soon.