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In fact it is not T3 or T4 specifically but it is the relationship as well as TSH.
What was your TSH when you got these readings?
So you did not have the TSH checked along with the T3 and T4?
Have you had adrenal and sex hormone testing?
It is supposed to be suppressed. But there is a wide range of normal suppression, from .3 to 4.5.
Do you know the value?