Diet and certain foods can affect our thyroid levels, Starting/Stopping a High-Fiber Diet, eating too many Goitrogenic Foods, eating too many Soy Products , starting/stopping Calcium or Iron Supplements
, Ibuprofen and
Aspirin can affect the thyroid, as well as many other things.
However, it's the natural course of hypothyroids for the thyroid to slowly burn itself out. As this happens, med. dose will need to be readjusted.
I am a low carber and it hasn't effected my levels.