One thing I’d like to clear up here. We live in a postcode lottery in the U.K.. where the laboratory to which a GP sends their blood test to may not test ft3. The GP can request all he/she likes but it’s the labs that control it. I’m extremely lucky that I live in an area where they do test BOTH T4 & T3 so it is wrong to say NHS refuses to do it.
I know most of us do not like the treatment we have received on the NHS for our thyroid condition, but please don’t give our false information. I for one am glad we have the NHS even if they don’t always get it right!
This is from thyroid uk site-
‘Be aware, though, that your GP may ask for FT3 to be done but the lab that the test form goes to may refuse to do it. You could try asking if your GP will add something to the test form to say "Thyroid function test including FT3 & FT4, regardless of the TSH reading." as this may help.’