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I have a high TSH but normal T4 levels, what does this mean?
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Dr. Robert Lang
Internal Medicine - Endocrinology
In brief: Hypothyroidism
The TSH test is10 times more sensitive for the diagnosis of hypothyroidism that the t4.
The TSH is reported on a log scale so that small changes in the TSH value are caused by relatively big changes in the blood level. This is a reflection of the pituitary being extremely sensitive to change in the T3 (liothyronine) level if you have symptoms it would be wise to seek treatment.

In brief: Hypothyroidism
The TSH test is10 times more sensitive for the diagnosis of hypothyroidism that the t4.
The TSH is reported on a log scale so that small changes in the TSH value are caused by relatively big changes in the blood level. This is a reflection of the pituitary being extremely sensitive to change in the T3 (liothyronine) level if you have symptoms it would be wise to seek treatment.
Dr. Robert Lang
Dr. Robert Lang
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