My TSH w/FREE T4 RFX (TSH, 3rd generation) is .06 (LOW). However, my T4, FREE is 1.2 (Normal); T4, Total is 8.2 (Normal); T3 Uptake is 28 (Normal); T4, Free, Calculated is 2.3 (Normal); and my T3, TOTAL is 217 (Normal).
Up until I reached menopause I was taking 4 grains of Armour Thyroid, since age 10. I was in an 11-year study at Children's Hospital, as my Father and I had the same problem, and they told me that I would have to take the 4 grains per day the rest of my life.