yes i halfed my thyroid medication since i started LC. I think i was over treated to begin with. they are now treating everyone with TSH >1 that is crazy.
My theory how this whole thing works is this.Ohh and I also had PCOS symptoms.
carbs increase insuline , insuline increases fat storage, fat storage increases estrogen production, estrogen decreases progesterone production , progesterone deficiency causes decreased thyroid. there are other pathways ofcourse. Like gluten allergy takes up too much cortisone secretion in the body and increases insuline resistence. The same is true with yeast infections. So you can choose to deal with this in so many different ways. Easiest lifestyle changes and low carb in perticular.
Many people have been able to do intermediate things i mention here and get to the same end point. Like people loose fat on low calorie diet come to the same conclusion. Some put on progesterone creme and dont need to take thyroid medication anymore.
I basically think this is the feed back mechanism inside our body.
You can find evidence for each of these relations individually. But I see the big picture this way.
I am not a doctor please monitor your thyroid levels regularly with a doctor. These are purely my views.
There is hope and plenty of it.