I was just reading an article about the thyroid by Dr. Oz and he mentioned the "2nd thyroid-compromising toxin is
perchlorate." It is" in our ground water in 43 states now and has been found in almost all water-rich produce" like lettuce, leafy greens, and watermelon. "This is a real danger to the thyroid." I then Googled it and it is really bad toxin. California was mentioned quite a bit concerning this. Yikes!