Wen,
what I am writing about below, is not meant to overwhelm you or disregard the value of blood tests, more so to help you embrace the suggestions being made.
I just copied this paragraph about B12 testing
The most common test is serum B12 - The reference range can be set as low as <110 - 900 ng/l in some parts of the UK. This is a problem as the test often misses desperately deficient people.
The serum B12 test, records all B12 in the blood, active and inactive (B12 Analogues), it does not record what is happening at cellular level.
The body cannot access inactive B12 and this can represent as much as 80% of the level showing in serum.
There are documented problems with the accuracy of this test, however many health professionals are not aware of this. Click here to read the NEQAS B12 alert.
long story short -the test result may well come back 'in range' - but the reality is that up to 80% of the B12 is not currently useable by the body. That is why we encourage members to supplement with the active forms of B12 and B6 (P5P).
as we mentioned in the other discussion - having good levels of Vit D3 is important but the body needs magnesium to use the Vit D3 properly.
the other aspect to this is - the test result is at a fixed point in time. I know from my own personal experience that my Vit D3 level halved in a period of 2 months when there was excess Stress (moving interstate etc)
in the past 12 months or so from experience of members here - we have learnt that with good Vit D3 levels, and supplementation with magnesium (whether that be orally or topically or combo of both) AND active forms of B6 and B12, there can be VAST improvement MC wise and with other health issues linked or not linked to the MC.
Most people here can gauge that that they need more of something or less of something supplement wise via 'listening to their bodies' - for season changes, or high stress periods, or if you get the flu, have anesthetic etc increase the dose to support the body through that period.
hope this helps