reverse t3 testing.

[Mag999]

I’m on a journey with t3 so far taking has not affected serum t3 levels and I have read that reverse t3 can block active t3.

Has anyone here tested for this and did you find it useful? I understand it is a somewhat controversial test in the medical world

Thanks!

[greygoose]

Testing rT3 is long and expensive, and doesn't give you any useful information that you can't get from testing FT4 and FT3 at the same time.

There are many, many reasons for high rT3 and only one of them has anything to do with thyroid. Also, if I've understood your post correctly, you are on T3 only? In which case you would have zero rT3 because you can't have rT3 without T4.

But what you've been reading are the old theories about rT3. We now know that it doesn't block T3 receptors because it has its own receptors.

And, besides, that could not affect your serum FT3 blood levels in any way. So, rT3 is really not anything to be concerned about. Testing FT4 and FT3 is far more important.

[Mag999 in reply to greygoose]

Thanks very much for clearing that up! There is so much information to wade through when things aren’t going straightforwardly so I appreciate you taking the time to reply

[greygoose in reply to Mag999]

You're very welcome.