Dear askef;alskdf’as (I’m curious how to pronounce your name)
From what I have read and heard from doctors, in people without thyroid disease, thyroid levels don’t change on a day to day basis. They should be the same today, tomorrow, next week, month. They don’t fluctuate like insulin or estrogen. Because of the long half life of thyroid hormones the thyroid axis is very slow to react to changes at any level. That’s why it takes so long to bring thyroid levels under control with ATDs or to find the right replacement dose because the system doesn’t respond immediately. Its true that within a
population, different people need different levels of thyroid hormone.
But for any one person it should stay the same day in and day out.
So I think the doctors try to give the dose of synthroid that the average person in the population would need to get full physiological replacement. That doesn’t mean that your thyroid is average and therefore as another post suggests if the average dose doesn’t work for you may be need to find a combination that does.
George.