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Thyroid UK
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Help with results please

Hi just had my blood test results and I was sure they would come back under medicated and they are as follows .. TSH 0.68 ( 0.27-4.2)

T4 17.6 (12-22) I did take my levo the morning before my blood test which was at 2.30 pm ! My gp won't do the FT3 so I have to pay biolab to find out ? My dear friend who has had thyroid issues for over 20 years said it could be that my T4 is not converting ? I have had a lot of stress and I believe this can hamper conversion ? I'm on 75mcg levo

Your thoughts would be appreciated just want my symptoms to go :(

Many thanks X

6 Replies

Lynnwinn, you need a FT3 result to determine whether or not you have a conversion issue and because you are using a different lab it will be better to have TSH, FT4 and FT3 tested at the same time.

Levothyroxine can peak in the serum up to 6 hours after ingestion which can elevate FT4 which is why Levothyroxine should be taken after a blood draw.

TSH is highest early in the morning and low in the afternoon which is why early morning blood draw is recommended.


I am not a medical professional and this information is not intended to be a substitute for medical guidance from your own doctor. Please check with your personal physician before applying any of these suggestions.


Thank you so much :)

Just like my friend says these bloods are useless :(

Will repeat them all with bio lab and won't take my thyroxine thank you so much xxx

1 like

Lynnwin, they're not useless but FT3 will show whether they're optimal.


Thank you will have FT3 FT4 TSH done by biolab ... Is it true what I've read about stress that it affects the conversion from T4 to T3 ?

Thank you xxx


Lynnwin, stress, illness, low vits and mins can all reduce conversion.


Oh dear had plenty of stress :(

Had my b vits checked through biolab and my B1 B2 B6 were deficient the gp prescribed the vitamins but won't retest on the NHS so stupid when they prescribe the vitamins so I have to pay to retest :( I was having B12 injections but he has stopped them as my blood test for B12 was 2000 way over top off range !

I was taking Vit D but have not taken it since November maybe I should start again ? I have hashimotos and offton wonder if I get a flare up of antibodies ? .. I was hyperactive 11 years ago then the hospital got my thyroid back to normal then fine for 10 years until last March :(

I'm finding hypo worse than hyper

The indigestion and banging heart and body aches are the worst :( I also am a coeliac so two autoimmunes :( thank you for taking time to reply to me xxxxx


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