I've been working in a fish restaurant for the past twenty years. I stopped eating tuna and swordfish about ten years ago, because of mercury, A friend of mine ate sushi almost every day for lunch until the hair on his body started falling off. He found out that it was due to all the tuna he had been eating. My cousin who is in his 80's today had all the fillings in his teeth removed and replaced about 4 years ago. After about 2 years of dormancy, my GD has reappeared, although in a limited way, thank goodness. It's just reminding me how insidious it is !!