"Ferritin is required for transport of T3 to cell nuclei and for the utilization of the T3 hormone." You want your ferritin in good supply. :)
Dr Mercola has an article Optimum Diagnosis and Treatment of Hypothyroidism With Free T3 and Free T4 Levels...
"In order to optimize the hormone replacement, the Free T3 and Free T4 should be above the median but below the upper end of the laboratory normal reference range. The goal for healthy young adults would be to have numbers close to the upper part of the range, and for cardiace and/or elderly patients, the numbers should be in the middle of its range. The Free T3 and Free T4 levels should be checked every month and the hormone therapy readjusted until the FT3 and FT4 levels are in the therapeutic range described."
Thanks for reply,
I spoke to my doctor about the ferritin result. He has prescribed me ferrous sulphate 200mg but did so reluctantly because he told me they do not prescribe iron supplements until the ferritin is in single figures.
Re the Levothyroxine - I asked him about the interaction between that and the ferrous sulfate. He had no idea I was on Levothyroxine and has said that this medication is not on my repeat prescription.
The medication review date was meant to have been the start of November and has now been moved to the middle of November. So instead of it being in 6 weeks' time as planned it will now not be done until 10 weeks have passed.
Ferritin - not normal. FT4 and FT3 too low in the range.