What's considered the best time to take a blood... - Thyroid UK

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What's considered the best time to take a blood test, to check levels?

Ooohmatron profile image
5 Replies

Hi there, general query, but wondered what the best routine/time is to take a blood test to check thyroid levels.

I've usually taken my own tests in the morning about 9.30am, but I've always done this after taking my thyroid meds at 7am that same morning. Having read a few messages on here, I'm beginning to wonder if I should be doing it differently?

Cheers

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Ooohmatron
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J972 profile image
J972

Yes, absolutely. It’s been found that having your bloods checked around 9am (fasting), having last had Levo 24 hrs previously, gives the most helpful indication of how your body is responding. Take your Levo after the blood draw.

I see this method referred to on the forum as a ‘patient to patient tip’, rather than being something inspired by or endorsed by the medical profession.

Hope that helps? J

Ooohmatron profile image
Ooohmatron in reply toJ972

That's what I was beginning to suspect after having read a few posts this morning, so thanks a lot for clarifying, much appreciated!

SlowDragon profile image
SlowDragonAdministrator

As you have Hashimoto’s it’s important to test vitamin D, folate, ferritin, B12 too

Ooohmatron profile image
Ooohmatron in reply toSlowDragon

I do get those tested regularly, they are generally fine and within range. I take supplements for those to avoid any spikes/drops.

tattybogle profile image
tattybogle

See replies 3 and 4 to this post for the science explaining why early am / pre levo dose / fasting tests are recommended.

healthunlocked.com/thyroidu.... my-list-of-references-recommending-gps-keep-tsh-lower-in-range-

also see this pinned post : healthunlocked.com/thyroidu... suggested-thyroid-hormone-test-timing-protocols

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