The free t4 is the actual amount of thyroxine circulating in your blood.
The t4 total is the free t4 and the amount bound to a protein and doesn't reflect the actual amount available for your body to use.
Here is a link to Thyroid Manager with a chart for reasons why total t4 may be elevated:
http://www.thyroidmanager.org/chapter6/Ch-6b-5.htm
Have you seen an endo at all?
Just my PCP. It is T4 Thyroxine. What is the difference in T4 and free T4? I am not on any estrogen or other hormone replacement. Thanks for your help.
Is this a total or free t4? It looks like total. Free t4 is a better test.
If it is a total, estrogen can increase it. That would be estrogen from birth control or any other supplemental estrogen.
The TSH would do well to come down a bit. It may continue to come down by the next blood test.
Ask for a free t4for the next time.
T3 uptake is also an outdated test.
Is this an endo ordering these?