Yes I have had my thyroid tested a couple of times over the years. My sister has Graves Disease. Diabetes runs in the family but every time I get tested I'm fine. I have had so many blood tests and they come back negative. Except for one. I was tested last year for heavy metals. My iron count was pretty high. My doctor said I had only one gene for hemochromatosis so I was lucky. I asked her if it could be that I cook every day in my cast iron pans and she said no. I was also tested 3 times over the years for Hep-C and other blood diseases, all negative. I just had more blood tests and my iron count is normal. ??????????