I'm not much good with maths, but I think that if you feel well on a dose, then that's the right dose for you. Labs are only supposed to be a guide - doctors forget that. And lots of people need their FT3 to be slightly above range - but yours isn't even above range in the test, so Don't worry about it.
Joesmum, we're probably all over range temporarily after taking a dose of T3. The point of leaving a few hours between last dose and blood draw is to measure the circulating FT3 level rather than the peak level caused by taking T3.
If you leave 24 hours between last dose and blood draw FT3 can be extrapolated by +20% to estimate normal circulating T3. So, anyone with FT3 towards the top of range is likely to be slightly over range but, as GG said, the range is a guide.
Thanks so much everyone. Great replies....and clearly not a difficult question!!
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