What are the tests to determine tissue resistance?

[cc120]

That is tests, blood test results to determine tissue resistance to T3?

[Jazzw]

CC, I don't think there are any, that's the problem. You can only really use FT3 tests to see what's circulating in the blood stream, but it's perfectly possible for lots to be sloshing around and only some of it being absorbed at a cellular level.

[cc120 in reply to Jazzw]

Thank you Jazzw, so if the NHS won't do RT3 tests, you have no way of knowing if FT3, even if you have a high FT3 reading, is being assimilated at a cellular level?