Thyroid UK

when to stop NDT and how long to fast before blood test?

Hi guys,

I'm seeing a specialist on Wednesday and wanted to double check on what time I should stop taking Armour and eating to ensure any blood tests come out OK? My appt isn't until 1.30pm but want to make sure i get a good reading for thyroid not so bothered about blood sugar as i get this checked regularly. I know some say take last dose the day before and wait till after. I have asked before but can't find my questions and answers in the forum. Thanks! :)

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Stop taking Armour 24 hrs before you have bloods drawn & take after the draw. TSH is highest very early in the morning and probably at its lowest at 13.00.

Click on your user name to see your activity healthunlocked.com/user/BexyLS

ps there appears to be conflicting evidence as to whether fasting or non-fasting affects TFT.

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Thank you

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Clutter is right about timing as your TSH wont be so high at 1p.m.

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Thank you x

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It's ok as the Doc Im seeing uses FT4 FT3 and RT3 too. It's why i decided to see her as GP goes by TSH ONLY (grrr)

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It's ok as the Doc Im seeing uses FT4 FT3 and RT3 too. It's why i decided to see her as GP goes by TSH ONLY (grrr)

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Around 8 - 8.30am would be the best for your blood test.

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