I have to have the TSH test; my blood tests showed I was a tad low in March but my doctor didn't want to rush things, said it could be from the winter when things go down a bit it seems. So we wanted to see if it was left over from my hibernating :-) or a low reading. The thyroid is such a tricky thing. I would be worried, wisewoman, if she took too much whacking it out in the other direction which is equally as bad. I'm not thrilled with the whole supplement thing when it's not really clear what's going on. My father's sister did have to have her thyroid destroyed and do life on synthroid too and she turned 85 this year.