tsh level 0.04-4.0 are normal so why do people here say lower than 0.04 are normal

[susiebow]

[shaws Administrator]

The TSH level is meaningless in itself. Normal range means for people who do not have a thyroid gland problem. When it rises you are hypothyroid. If we are on medication some people need to be on a lower dose in order to feel normal health. Others need to be higher, it all depends on how our metabolism. This is an extract:-

My reason for this different protocol is simple: the TSH, free T3, and free T4 tell us only how the pituitary and thyroid glands are interacting. Of course, the test levels may also tell us something of the influence of thyroid hormone over the hypothalamus in its secretion of TRH, another hormone that influences the pituitary gland's secretion of TSH.

Tissue measures of thyroid hormone tell us what is most important, that is, how the patient's tissues other than the pituitary and hypothalamus are responding to a particular dosage of thyroid hormone.

web.archive.org/web/2010103...

I myself didn't understand 'tissue measures etc' but I certainly did when on the right medication for me as I had no more joint or muscle pain and did not feel unwell any longer.

[DanteNXS]

I think you mean 0.4-4.0 are the normal limits.

Right?