Hypothyroidism is so prevalent these days, and yes it will make your metabolism sluggish. And antidepressants only add to it.

I have a suggestion for you, which you should feel totally free to ignore, to research increasing your intake of iodine. The Japanese diet averages 12mg of iodine, U.S. RDA is caclulated to barely prevent the goiter, and does not do it well enough. At the same time we are being flooded by other halides: fluoride and bromide, neither of them does our bodies any good. There are few cases where increasing iodine, either through Lugol's solution drops or dietary sources can have terrible effects, but not for most of us.

The medical establishment is very much against it, and would have us believe that if we ingested as much as Japanese do, we would suffer from heavy metal poisoning, so the element our bodies need is bad, but its relatives that actually ARE poisons we are being force fed daily. Hmmm....

Anyway, I do encourage you to do your own research. There is plenty of pro and plenty of con. I have been taking 5 drops 2% Lugol's solution a day w/o ill effects for 1.5 years. I noticed increased energy when I started and my TSH dropped by half (it was through the roof!) within the first week. If you are taking thyroid supplements you need to go very, very, very carefully, like start with 1 drop a day. Have your thyroid hormones re-tested (full panel, not just T3 & T4, they need to also check the pituitary's TSH, and something, forgot what's it called, it measures re-absorbtion).

This site contains info on how to deal if you start experiencing detoxing reactions: http://breastcancerchoices.org/iprotocol.html