Thyroid UK
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T4 relevance?

Hi, I am new to this and would love some advice. I had a thyroid test via geneva diagnostics and the results that came back showed me in the normal range for everything apart from T4 which was low. When I took these results to the Dr they were not interested. They said that as my T3 and TSH were fine, that meant my thyroid was fine and no further action needed. I kept asking that surely the T4 being low must mean something but he insisted that no, there was really nothing wrong and nothing needed doing. I am a super healthy eater and I exercise regularly but cannot shift weight, I also can get really tired at times, which was my reason for wanting the test in the first place, it is very very frustrating.

3 Replies

Hi jo4holistics and welcome

If you post your results, including the ranges, some of the wise ppl on the forum may be able to guide you. :)


Yes, please post your results and ranges so that forum members can advise.

I had low T4 on diagnosis and subsequently found out (genetics test) that I have a faulty gene which means I don't convert T4 to T3 very well.

So it is useful to know your T3, but the results might show something.


If they have not been done ......Suggest you ask GP to check levels of vitamin d, b12, folate and ferratin. These all need to at good (not just average) levels for thyroid hormones (our own or replacement ones) to work in our cells

Also have you had thyroid antibodies checked? There are two sorts TPO Ab and TG Ab. (Thyroid peroxidase and thyroglobulin) Both need checking, if either, or both are high this means autoimmune thyroid - called Hashimoto's the most common cause in UK of being hypo

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