As you know often when people arrive on this forum, or come back with new problems, we do as admins often advise, that individual if they can possibly afford it, (and yes I am always having to save up for myself and children), do extra panels of tests. This is because B12 deficiency can cause a host of problems I will put a paper below, and also poor Thyroid function, either due to very narrow testing or medications not working as well as they should. An untreated Thyroid or an inadequately treated Thyroid can cause terrible problems. This is why we also encourage our members to join the Thyroid UK forum, if they feel they do have problems.
If you are supplementing with B12 tablets or liquid or patches prior to testing it can alter the test results. If you are on Thyroid medication, it is best to test before you take your daily dose etc.
We know we have enough problems, having Hughes Syndrome/APS, and many of us have extra diseases on top. I know from personal experience that when I tested I found my own Thyroid was extremely slow, I also had low Vitamin B12 plus low D, plus of course passing two out of three of the main Hughes Syndrome/APS tests. The same for my children despite a very healthy Mediterranean diet plus exercise.
If you are on Thyroid medication, alongside a panel like this medichecks.com/thyroid-func... you would also need to consider a Reverse T3 test. We are not medically trained but we have been sorting these things out for ourselves and others for a very long time.
ncbi.nlm.nih.gov/pmc/articl...
ncbi.nlm.nih.gov/pmc/articl...
The current testing I am doing at the moment is the link above, but I also use Blue Horizon who also have good tests, and you can apply the code MARY20 to get a discount on their main tests.
MaryF