Q about normal RT3 lab ranges

[Guest guest]

Most of the labs that test for RT3 have a range of 90-350.

Who comes up with these ranges?

And HOW did they come up with these RT3 ranges as NORMAL?

Usually labs establish this by seeing what are normal ranges in " healthy "

people. So does this mean that most healthy people fall into this range? That

doesn't make sense.

Because unless people have an RT3 level around 120 or less, they would all have

been at a ratio under 20 (unless they had really high FT3) and what would be

considered by Holtorf and this forum as an RT3 problem.