But also keep in mind that you can be hyper thyroid like I once was and still gain weight, having a thyroid disorder can cause your whole body to go into a tail spin. For me when I was hyper thyroid I was ALWAYS hungry ravenous eve, and because I was hyper I was very very very tired I slept ALL the time now I was told by my doctor that the symptoms I was having were very rare in a hyperthyroid case. It was because I was producing so much hormone that it was making me crash. They were actually very very suprised that I didn't have a heart attack because of my levels. That was my experience with hyper thyroid, but now I'm Hypo because I had the goiter that was producing my hormones removed so it made me go to the opposite, now I have the same symptoms as before just not nearly as bad as when I was hyper thy.
Just wanted to share my 2 bits

Michelle