I'm 35 years old and have an underactive thyroid(hypo) and have had it for 17 years. I have tried dieting before but never really stuck to anything. I finally decided to something about it this year and have lost 15lbs ytd. But for the last month I have not gained or lost any weight. This is what makes it very frustrating for me. And no change in the scale makes me want to quit. I hang in there though. But it's hard.