Help! I received my blood test results today and had a little panic!! I wondered if I was over medicated.
I’m on 50 micrograms Levothyroxine which I realise now that I shouldn’t have taken on the morning of the test. I took the Levo at 5.20am and had the blood test at 10.20am.
The results were:-
Serum free T3 3 (down from 3.71 in April unmedicated)
Serum free T4. 29 ( up from 19.8 in April unmedicated)
TSH. 0.47 ( down from 4.43 in April unmedicated )
Does iodine help with conversion of T4 to T3?
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5ESU
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Do you have reference ranges for each of those tests? This is important as they are different at each lab.
How do you feel?
What are you supplementing with?
What were your latest results for ferritin, folate, B12 & D3?
It's ideal if you can always get the same brand of levo at every prescription. You can do this by getting GP to write the brand you prefer in the first line of the prescription. Many people find that different brands are not interchangeable.
If this is a GP test then ask to be retested and this time around remember you need 24 hours between taking Levo and the blood draw. Your FT4 may well have been within range at least although you do seem to have a conversion problem.
I'm assuming that you're a small person as 50mcgs is a very low dose for the average person.
As you're supplementing then your vitamins look OK.
You might want to email info@thyroiduk.org for a list of T3 friendly Endo's.
Retest correctly and include thyroid antibodies and vitamins
Stop any supplements that contain biotin 5-7 days before test
Recommended that all thyroid blood tests early morning, ideally just before 9am, only drink water between waking and test and last dose levothyroxine 24 hours before test
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 all relevant vitamins
List of private testing options and money off codes
No, it doesn't. Iodine is one of the ingredients of thyroid hormone, T4 having 4 atoms for every molecule of thyroxine, and T3 has three. Conversion is the removal of one of those iodine molecules.
Ferritin was high 350
But did you have the CRP tested at the same time? CRP is an inflammation marker and high inflammation levels cause falsely high readings of ferritin. So the two should always be tested together.
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