NDT RESULTS ??: I did a medichecks blood test for... - Thyroid UK

Thyroid UK

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I did a medichecks blood test for tsh, t4 and t3. here are the results

tsh 0.203 (range 0.27 - 4.20

t4 12.400 (range 12.00 - 22)

T3 4.82 (range 3.10 - 6.80)

I am self medicating with thiroyd. my gp's lab only tests t4 and tsh and i wanted a t3 reading. i thought i had got the hang of readings as it took me ages to understand it all, mostly all of my information comes from this forum. i understood that low tsh is common when on ndt and that you aimed for a higher t3 to feel good etc. however, when i received my results the doc there said my tsh was low and everything else was normal but my understand of my results is that the t3 is low - i wanted to know my results to see if i should decrease or increase my meds. the doc at medichecks said my dose was too high. i am currently taking two thiroyd tablets. can anyone shed any light - have i got it all wrong

9 Replies

Medichecks comments are a waste of time, they just follow standard GP thinking

On NDT your TSH is nearly always suppressed or below range. Your correct, on NDT most important thing is FT3, which is rather low.

How do you feel?

What are your vitamin D, folate, ferritin and B12 levels like? Have they been tested recently and what supplements do you take

i do have d3 and b12, selennium, magnesium and b1 but i admit that i more often than not forget to take them as am feeling ok - quite normal in fact compared tohow i used to feel

thank you i thought i had got it all wrong. i actually feel ok but am finding it hard to lose weight although it is coming off very slowly but otherwise i feel fine. maybe i should just stay on the same dosage

SlowDragonAdministrator in reply to thyroidnodules

Perhaps increase a tiny amount. Retest in 6-8 weeks. Would strongly recommend including vitamins if not been tested for a year or more

What vitamin supplements do you take?

See you previously had RAI for Graves

Low vitamin levels are extremely common.

Are you on strictly gluten free diet or tried it?

If not tried it, give it 3-6 months. If no noticeable improvement reintroduce gluten and see if any different




no i dont have graves. i had to have rai for a very large thyroid nodule attached tothe side of my thyroid


How long did you leave between meds and test?

SlowDragonAdministrator in reply to Hidden

Good point !

thyroidnodules in reply to Hidden

i usually take my meds at night before bed so i didnt take them the night before test and i took the test first thing in the morning on an empty stomach


So - you left about 36 hours. You can extrapolate what your FT3 is at 'peak' level after taking by adding 10% for every 12 hours. That would bring it up to about 6.3.

If you feel ok, don't increase. Next time you have blood test leave only 12 hours. Do this by taking your usual night time dose and then having blood test about 12 hours later.

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