B12 level 427--is this causing my symptoms?
 

I have been reading the forum and appreciate all of the information from all of the people here. I apologize in advance for asking for advice on something that has already been so widely discussed. I'm sure if I had the time and energy I could search and find the information I am seeking but...:o

I have been dealing with intense fatigue and a vague dizziness sensation for a few months. I get motion sickness practically at the turn of the head and there's something related to my vision or my eyes. It is hard to describe and I don't know if it is a processing thing or an eye thing. If I move my eyes from one side to the other I get dizzy and can actually become nauseous. Also, it seems like there is a delay in the focusing.

I initially had a very mild anemia that seemed unrelated to iron (my ferritin was 57). I had blood tests recently to check on the anemia and also to check my b12, folate, and homocysteine. My CBC came back with everything within range, by folate was >24, my homocysteine was 4.2, and my B12 was 427.

I found a couple of sites suggesting that a b12 level under 500 could cause symptoms. I don't think my doctor will think that my symptoms are due to a lack of B12 since she called and said everything was fine.

So, is it likely that my symptoms are related to B12? And, I have started taking SL B12 anyway, but it is the cyanacobolamin not the methylcobalamin. Can I raise my B12 with the cyanacobolamin or should I trash it and buy some of the methyl?

How much do I need to take to raise my levels the fastest. Obviously I want to feel better as soon as possible and if it is due to low b12 I need to take b12. I don't want to take too little but I don't want to waste it either. Right now I am taking 1000 to 1500 mcg of the cyanacobolamin daily.

Thanks in advance and again sorry for not searching further for the answers! :)

Heather

the MMA test
 

will show if you are utilizing B12 properly. It is slowly being accepted as
more reliable than the serum B12. In Japan they are more aggressive concerning
blood levels than US.

Do you know what your MCV was (mean corpuscular volume). If it is elevated,
that is an early warning of B12 deficiency.

My MCV was 90--normocytic. I did not have a MMA test. I know that is a better test for b12 deficiency but I figured I would push for that if my b12 was low. I have an appointment with a hematologist next month for an unrelated reason but I could talk to him about getting a MMA. If I am on high doses of b12 will that affect a MMA test?

Thanks,

Heather