I have just got back from my GP. My TSH, FT4 and FT3 are all low. He has just told me the reason why my TSH is low is because I am taking too much T3 (40mcg).
When I pointed out that surely if I were taking too much T3 my FT3 results would be high instead of low, he replied that the FT3 results only show how much is in my body naturally. In other words, what my body is making. The 40mcg that I am taking daily is an artificial dose and will NOT come out in the blood tests.
I am baffled!!!