T4 levels when on NDT: I am new to NDT. Should I... - Thyroid UK

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T4 levels when on NDT

Daffers123 profile image
4 Replies

I am new to NDT. Should I expect my T4 levels to be lower than when on Levo only ?

Thanks

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Daffers123
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SeasideSusie profile image
SeasideSusieRemembering

Daffers123

Yes. The T3 in NDT is what lowers FT4. TSH also tends to be low when on NDT, often to the point of being suppressed. It's the FT3 result that's important when taking NDT.

Daffers123 profile image
Daffers123 in reply to SeasideSusie

So sorry meant to press Like icon but hit Report by mistake.

Hope I've done no harm and thanks for reply, much appreciated.

Lalatoot profile image
Lalatoot

When you add T3 to your medication it can make Ft4 lower. Some folk are fine with low Ft4. Others, like me, need their FT4 well over half way through the range and balanced with their Ft3 - ie both about the same % through range.

It is an individual thing. So how do you feel?

Some folks take levo and NDT to raise their Ft4.

Daffers123 profile image
Daffers123 in reply to Lalatoot

Thank you. My T3 is 5.7 so well up in range, T4 down to 10.4, so a little low. TSH is 7 which I know is high but I can't tolerate more T4 and feel pretty good, thank you very much for asking and for your comments

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