I've had a load of blood tests done privately - and I'm even more confused now than I was before. I'll be posting some more questions once I've got my head round it all, but I just wanted to see if anyone can help me with this query about vitamin B12.
As background, I was diagnosed with ME/chronic fatigue way back in 1999, and later - when I started to get a lot of join pain - with fibromyalgia and then polymyalgia too. I've since developed other symptoms such as severe constipation, very dry chapped skin, dry eyes, etc. I've been tested for lupus and sjogren's syndrome - and the docs say "no" to both of those. I seem to have all the symptoms of hypothyroidism - though all my thyroid blood tests come back fine (more on those in another post shortly).
I had wondered about B12 deficiency - but my results have come back as follows:
B12 - 777 ng/L (191 - 663)
So I'm actually *above* the highest level in the range! Here's what the doctor said about it in his report:
"The high level of Vitamin B12 is a good finding. B12 is well tolerated by the body, even in very high concentrations. Many experts believe that the lower limit is set too low and that many individuals are deficient despite being 'officially' in range. 500ng/l plus is possibly the target that should be aimed for. Anyway, your level appears fine."
I *think* this is the serum B12, not the active B12 test. Looking at it, it seems like I have plenty of B12 in my system, as the doc says. But then I read an article somewhere which said that if there is a high level of B12 in the blood this *may* mean that it's just building up there and not being utilised properly - hence, I might still actually be deficient in it. I suspect, though I'm not sure, that I might have a problem with malabsorbtion, since I'm always anaemic and have low vit D levels too. Can anyone help me shed light on this B12 reading please? I'm really confused about this now.
I am thinking I might try a sublingual B12 supplement anyway - just to see if it does seem to give me more energy - since I guess you can't take too much of it?