Can anyone help me understand why my thyroid results are about the same with or without levothyroxine?
I have had 2 recent thyroid blood tests, the first was while I was taking 100 /125mcg (alternate days) and I took my normal dose on the morning of the test.
March 2017
(Taking 100 or 125mcg of levo on day of test)
Serum TSH <0.05mu/L (0.35-5.50)
Serum free T4 21.3pmol/L (11.0-23.0) SR
I then read it is advised not to take a dose for 24hrs prior to the next test as this can skew the results, so I followed this advice for the second test.
June 2017 (Taking no levo 24hrs prior to test)
Serum TSH <0.05mu/L (0.35-5.50)
Serum free T4 20.7pmol/L (11.0-23.0)
But I am confused as the results are about the same for both tests, is this usual? I thought the results would differ so does this mean I shouldn't be taking levo? is this why I feel so ill all the time?
Sorry for all the questions and appreciate any insight on this! x