Hi I'm new to this site but have had under-active thyroid for 18 years. I'm afraid this may be a lengthy post! I also have polycystic ovary syndrome (PCOS), and in last 2 years have been diagnosed with B12 deficiency and pernicious anaemia... I also have gastro intrinsic factor (GIF) which means I cannot absorb vitamins etc. easily from food. I recently ask my Drs. for the last 7 years blood test results and in reading them feel more confused than ever. Daily I take 125 mcg levothyroxine; 2000mg calcium and Vit D and 30mg lansoprazole (because of my stomach issue) and have B12 injected every 3 months.
The British Thyroid Foundation state that typical reference ranges for normal thyroids are:
TSH: 0.4 - 4.0 mU/L (milliunits per litre)
FT4: 9.0 - 25.0 pmol/L (picomoles per litre)
FT3: 3.5 - 7.8 pmol/L (picomoles per litre).
However when I put all my results in a spreadsheet my TSH levels are up and the T4 going down – I read also on BTF that usually a high TSH level with a low FT4 level: hypothyroidism (under-active thyroid) but a low TSH level together with a low FT4 level can indicate a disorder of the pituitary gland – so from the below is there now an issue with my pituitary as the T4 levels have dropped quite a bit?
My readings are
01/02/2010TSH 0.162 T4 21.46;
17/06/2011 TSH 0.178 T4 20.08;
19/07/2011 TSH 0.041 T4 24.25;
04/09/2012TSH 0.178 T4 21.88;
03/05/2013TSH 0.064 T4 24.12;
31/05/2014TSH 0.562 T4 19.11;
26/10/2014TSH 0.14 T4 19.8;
19/02/2015TSH 1.79 T4 14.3;
24/03/2016TSH 1.5 T4 13.6
Sorry there is so much information but I've been feeling rotten for a while and need to tackle this as I'm sick of saying "tired", "I forgot", "I don't remember" or the concentration is so poor that I cannot even recall being spoken to just a few moments ago!