For full Thyroid evaluation you need TSH, FT4 and FT3 plus both TPO and TG thyroid antibodies tested. Also EXTREMELY important to test vitamin D, folate, ferritin and B12
Low vitamin levels are extremely common, especially if you have autoimmune thyroid disease (Hashimoto's) diagnosed by raised Thyroid antibodies
Recommended on here that all thyroid blood tests should ideally be done as early as possible in morning and before eating or drinking anything other than water .
Last dose of Levothyroxine 24 hours prior to blood test. (taking delayed dose immediately after blood draw).
This gives highest TSH, lowest FT4 and most consistent results. (Patient to patient tip)
Private tests are available as NHS currently rarely tests Ft3 or thyroid antibodies or all relevant vitamins
As requested in reply to previous post, please always include reference ranges with your results. This is most important because ranges vary from lab to lab. With my lab's range your FT4 would be over range as it is 7-17, with the private labs' range you would be 77% through rangeas it's 12-22. Other ranges we see are 9-19, 11-23, plus others. If the range went up to 24 then you'd be quite a bit lower in range. So you can see why we need the reference ranges which you can get if you ask for a print out of your results as suggested before.
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