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Thyroid Disorders Community

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MedHelp Member's Question

highish TSH, high Free T4

by moody2, Jun 13, 2009 05:45PM

My most recent test results (that I got yesterday) have TSH 4.01 (range 0.4-4.5) and Free T4 1.82 (range 0.7-1.79). The previous results from December were similar: TSH 3.74, Free T4 1.62. Does anyone know what could cause this? Shouldn't TSH be lower if the Free T4 is this high?

I've been on 50mcg levothyroxine since last summer, but I don't know...

Thanks for your thoughts!

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Member Comments (1)

by gimel, Jun 13, 2009 11:48PM

To: moody2

Yes, normally it would be expected that a high free T4 would go with a lower TSH; however, TSH is a pituitary hormone, that is affected by many variables and doesn't correlate very well to free T3 and free T4 levels. By the way, I would suggest that you ask that free T3 be added to your thyroid testing in the future. Free T3 is the most active thyroid hormone, that largely regulates metabolism and many other body functions. It is four times as potent as free T4, and it correlates best with hypo symptoms.

Speaking of symptoms, please describe any symptoms that you think might be related to thyroid.

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