I was diagnosed with borderline underactive thyroid 2 years ago and have been taking 25mcg of thyroxine daily. My latest blood test results are:-
Serum free T4 level is 11 - range 7.8 - 21
Serum TSH level is 4.2 - range 0.35 - 4.7
Doctor says these are fine and to continue with the thyroxine.
My serum ferritin level in February 2014 was 11 and my doc gave me Sytron iron supplement 10ml x twice daily and my level is now 55 (range 15 - 300) and he wants me to try half the dose and then have a further blood test.
Serum vitamin B12 is 234 ( range 180 - 11300 - he says this is fine.
These levels seem low according to posts I have read on this site - can anyone help?