I've been taking 125 mg for nearly 20 years. Am now 55 and my last few lab results have come back with low tsh but the latest is tsh 0.08 and t4 32.2 so my dose has been reduced to 100 with the warning that it may have to come down again. Have been on 100 for 1 month now and still feel the same. The thing is that I have no symptoms of hypertyroidism (which I remember from when I took 200 for a short time about 15 years ago) and am afraid of becoming hypo again. The only change I have made is that I gave up tea and coffee about a year ago. What do people think?