kazzy
I have had so many thyroid problems it isn't funny..Started off with Graves disease and severely hyperthyroid...but gained weight??then had radiation and now have hypo..and weight problem. As far as being within normal range weightgain shouldn't be from that. The hypothyroid slows down your metabolism..but you aren't that slow...Could it be your age?? Mid 20's your body changes and then as you get older it is easier to put on weight and harder to take it off. I have a very slow thyroid and take 200 mcg of thyroid replacement but still have symptoms of a low thyroid..so who knows. What are your other symptoms? You don't want to take the med if you don't have to. It isn't good for your heart etc to go on it if you don't need it.