I Had half of my thyroid removed 16 years ago. I was immediately put on synthroid. It made me crazy. I had rage and emotions that I couldn't control. I went through 2 divorces because of synthroid. I did not realize that was what was causing it. My doctors thought that i was crazy when I told them my symtoms. It must be the help of God because I stopped taking synthroid and started doing research and found out that sea weed would help me and do the same thing that synthroid did. Just a flake or two a day has been helping me for almost 2 years now. I feel great without the side effect that I would normally get from synthroid. Two much will make you weak though but the small about I take works just fine for me.