Vernon, how long have you had the underactive thyroid diagnosis and what were your symptoms? Whenever I come across an article about the disorder I always read it hoping that I will find the reason for my being overweight (and thus a magical 'cure'). Wishful thinking, of course! However, I read an article recently and I have about 6 of the 8 symptons mentioned. It said to take your temperature first thing each morning for 3 days and if it's consistently lower than 35.6 (I think) then you should consult your Doctor.