Thyroid UK

Not sure what blood tests to ask for?

I have hashimotos, and supplement with multivitamins, b12 and now selenium. I see from reading on this forum that it is important to check blood levels of some vitamins and minerals, I see ferritin is often mentioned, and iron? Was hoping someone could let me know what tests to ask for, and also, will the tests be accurate if I supplement? Thank you for your help.

2 Replies

Midnightblue, testing while supplementing will give you a picture of your vitamin and mineral health now/today but will mask any underlying deficiency.

I think iron needs to be stopped one or two weeks and B12 4 months prior to testing. If you just want to know your current supplemented levels just go ahead and test. It will at least indicate when you are replete and can stop supplementing.

We usually recommend ferritin, vitamin D, B12 and folate as these are the ones often found to be low or deficient.


Thank you very much, I will ask for those.


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