RT3 Lab workup

With the RT3 lab result, patients and their doctors look for two clues:

1) The RT3 result by itself is 14 or higher. We have seen that correspond with rising RT3

2) The ratio between the RT3 and the Free T3.  i.e dividing the Free T3 by the Reverse T3 (Free T3 ÷ RT3)…though they need to be in the same measurement.  Using the ratio, and for healthy amounts of RT3, the ratio result should be 20 or larger according to Dr. Kent Holtorf (info below). If lower, you may have a problem. Many patients without an excess RT3 issue have a result of 23 or 24.

If you use the total T3, patients are looking for a ratio greater than 10. If lower, it appears to be a problem.  Note that the unit of measurements for the RT3 and Free T3 are often different on your lab results and will need to be changed in order to be the same. Figuring out your ratio is here.

To order your own labwork, go here.  It’s legal. Remember to order a free T3 with the RT3 at the same time for ratio comparison, as well. 

If you don’t feel very math-savvy, STTM has created a beta conversion method for you, here. It still has a few kinks in places we are trying to work out. Let Janie know if you discover one.