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Originally Posted by Sargovar I think it would depend on how low you got your bodyfat.. if you went from, say, 13% down to 7%, then you will definitely experience thyroid downregulation, or maybe even near complete shutdown. Of course it's different if you went from 30% bodyfat to 24% or something like that.. in that case your thyroid's functioning could even improve (reduced aromatase activity freeing up receptor sites for thyroid & testosterone action etc), at least once you upped your calories again.
And then, everyone has an individual bodyfat setpoint, below which you will start to experience more and more metabolic problems.
I will hazard a guess that if you experienced thyroid & adrenal downregulation, it was because of the diet. If your thyroid & adrenals were in crappy shape to begin with, I doubt you'd be able to lose 20 lbs / 6% bodyfat, unless you were extremely fat to begin with and your body was really fighting to get rid of the excess flab (which happens when you're well above your bodyfat setpoint).
If you up your calories back to maintenance for a week or so (which should reset your leptin levels and thyroid) and start to feel better & notice an increase in body temperature, that's a good gauge that there is probably nothing seriously amiss. Of course, if you feel like shit whether you're on a diet or not, then that's a different matter altogether, and merits further study & possible blood tests. |
I went from 200 lbs down to 180....20% bf down to 14% . Ive been stuck at 14% bf for the last month now and have lost about 3-4 lbs ( which isnt a good loss). I agree with you that its odd that I'd be able to lose that weight if I had low thyroid. I'd imagine it could be the diet. I never went all that low in calories though. Ive been taking in between 2100 and 2400 over the last few months. anyway,,,I did make an appointment with my doc for next week., Im going to tell him about my temp and symptoms. I;ll ask him for a thyroid
test as well. I know an endo would be better,.,,but without insurance Im a little leery of how much that would cost me. thanks for the posts guys,,,I appreciate it!