I had my last blood test before finding this site (which is brilliant by the way). I had never been told not to take my Thyroxine before my blood test.
I take it at around 6.30am and had a blood test about 9.15am. My TSH was 0.95 (0.5-5.5) so all seems OK but I have symptoms and I am wondering if the result could be flawed by me taking my Thyroxine and if so by how much (I take 75 mcg).
I also had B12, Glucose and I think Ferretin tested which were all OK but I don't know the figures. (I never asked because I would not have understood them at the time).