Merry Christmas to you and all the other GD Warriors on this board. You asked about T7 in a previous post. What little I know is posted below:
T7 is also known as FTI or free thyroxine index. It is the product of your T3 * T4. My test results said that F7 should be between 4-14. I remember feeling best when it was about 13. My initial level was 31, but it was down to 13 in six weeks. I’m not sure exactly what it measures, but it seems to be a good indicator of hypo (below 4) and hyper (above 14).