Why should we have bloods 24 hours after levo dose?

[farrellkl68]

Just a question that my GP has raised on my recent results .

Showed TSH 0.1 (0.2-6) and T4 18.6 ( 10-20 )

I had teh test 24 hours ( 8.30am) after last dose levo.

So, should I be reducing my Levo dose?

Last NHS test October 2023 showed same TSH and T4 18.9. This was taken 12 hours after last levo dose.

I had a private test December 23 - 24 hrs gap which showed TSH 4.6 and T4 8.6.

I'm being retested in 2 months, at my request, as the lab said my results were fine