The answer for me today is apparently more than 2. (Apologies for the following rant in advance).
My appointment today with my normally lovely doctor was sat in by an American exchange doctor as well. My doctor has known for quite a while that my thyroid is giving me no end of pain and troubles, but said last visit to wait till todays appointment to get bloods done so i could recover from chest and sinus infections and laryngitis. I haven't had bloods done since May, so am overdue anyway.
The visiting doctor was only meant to sit in the corner and observe, but when I explained to my doctor that I wanted my vitamins levels checked as well as thyroid bloods, the American doctor started to go on and on about how she read that my area of Australia is low in iodine and how people are using Himalayan salt now instead of iodized salt. She said it causes goiter and "generous" sized thyroids (her words, not mine) in the people, and how even though i take supplements already, I need to be urine tested for iodine and supplemented it as it would fix all my issues. My doctor lapped all that hogwash up and sent me out the door with only a urine pathology request for iodine, instead of any thyroid blood tests. I am spitting mad.
I know some health professionals give their Hashi's patients iodine, but I have read too many articles on how it negatively impacts a person once they develope Hashimotos.
Makes me wonder if ignorance between the medical profession is contagious? 🙄