What is the optimal TSH level for settled dose of T4?

[Guest guest]

I heard there is someone that said the opitmal range is 0.3-2.5. but

not sure if it is true or not. Many are treated for TSH level is as

low as 1?

I just read a paper that states 3 ranges of low TSH levels classified

into three degrees, it said that as follows (extract from it).

" 1. 0.1-0.4mU/L,---subclinical hyperthyroidism

2.0.05-0.1mU/L( for some authors, 0.02-0.1 or 0.2mU/L).--The different

diagnosis is similar to the previous one. Some others consider that is

overt hyperthyroidism. Such TSH levels are the goal of T4 treatment in

patients with differentiated thyroid cancer.

3.less than 0.02mU/L--endogenous hyperthyroidism and possibly in

severe panhypituitarism.

4. 0.45-2.5 mU/L with a median of 1.0-1.5mU/L is the normal

range. "

What is your thought? What is the optimal TSH level for settled dose of

T4? In the range, or " should be lower than 2? "