I have been on Thyroid-S from Thailand for about two years now. Feeling good most of the time, and I have managed to lose all the weight I put on while being hypothyroid and on T4 only drugs (in total 20 kilograms or 3 stones). However, both my FTs are pretty lowish:
FT4 0.8 ng/dL (ref 0.7-1.5)
FT3 2.9 pg/mL (ref 1.7-3.7)
I take NDT once daily, in the morning, and go to the lab 24 hours after taking any. So my FT3 levels were probably a little higher (+/-20% higher?) the previous day.
My doctor, who was trained by Thierry Hertoghe, said my FTs don't matter that much since my TSH is completely suppressed (<0.01), which means the NDT is working (my doctor thinks I'm on Erfa, BTW).
This is a new way of looking at things...normally, when on NDT, you look at your FTs, especially your FT3 levels, to decide whether you are under-, over- or optimally medicated. My doctor chooses to see my suppressed TSH as a sign of being optimally medicated.
I have previously tried to raise the Thyroid-S but ended up with hyper symptoms within days, so the dose I am currently taking (and have been taking for the past two years) is one which allows me to feel fine with no hypo or hyper symptoms. Strangely enough, I don't seem to need to raise it even during the winter months.
What I am basically asking is...should I accept my rather low free Ts (especially my FT4 levels), and only care about how I feel?
I know that Thiroyd contains FT4 and FT3 in different ratios than Thyroid-S, so I have been thinking lately about switching, but I really see no reason to as long as I feel fine on Thyroid-S...I am not crazy about all the fillers, but why rock the boat...?
Any input on this would be greatly appreciated.