Loubylou17 The advice you were given in your previous post still stands.
You weren't overmedicated when your GP reduced your Levo from 75mcg to 50mcg. As your TSH goes up, your FT3 will go down, your FT4 will as well but it's not showing yet.
You were given the quote from Dr Toft's book. Another one from an article he wrote for Pulse Online Magazine is
"The appropriate dose of levothyroxine is that which restores euthyroidism and serum TSH to the lower part of the reference range - 0.2-0.5mU/l.
In this case, free thyroxine is likely to be in the upper part of its reference range or even slightly elevated – 18-22pmol/l. Most patients will feel well in that circumstance.
But some need a higher dose of levothyroxine to suppress serum TSH and then the serum-free T4 concentration will be elevated at around 24-28pmol/l.
This 'exogenous subclinical hyperthyroidism' is not dangerous as long as serum T3 is unequivocally normal – that is, serum total around T3 1.7nmol/l (reference range 1.0-2.2nmol/l)."
If you want a copy of that then email email@example.com
You know that you need your vitamins and minerals at optimal levels for thyroid hormone to work properly and these are:
Vit D - 100-150nmol/L
B12 - very top of range, even 900-1000
Folate - at least half way through it's range
Ferritin - at least 70, best half way through it's range
So it now depends on how you feel and where your optimal level lies, so you need to discuss all these things with the endo. If you are symptomatic on your current dose of Levo then you need it increased to a level where your symptoms abate and you feel well, and you have to show the evidence to your doctor that a suppressed TSH is not an indication of over medication.