I have a yeast overgrowth in my digestive system as per stool testing through Life Extension. I also recently had a heavy metal test done through Life Extension. I was informed that my mercury levels were quite high. It was implied that my 5 metal fillings that are approximately 40 years old are causing the high mercury levels. My doctor said "everyone has high mercury levels" and did not recommend filling extraction. Perhaps my Hashimoto's disease and yeast overgrowth are affected by the mercury. Just mentioning this as people are wonder what is causing their immune dysfunction. Susan