The site in the post above is a great one for finding about tests.
I did have the B12 and related tests (methylmalonic acid and homocysteine). The methylmalonic acid and homocysteine levels in the blood are related to B12 and are apparently more sensitive measure of B12 deficiency/problems. The body normally uses B12 to turn them into something else, but when there isn't enough B12, the body can't do that so there's too much methylmalonic acid and homocysteine left over in the blood.
As far as I understand it, at least as regards B12, methylmalonic acid and homocysteine are bad when they are high. I had low homocysteine, but the neuro didn't seem to think anything of it and as far as I could tell from googling it doesn't seem to be harmful.
See http://www.aafp.org/afp/20030301/979.html for more info.
Hopefully, your doctor will be able to tell you more clearly what all this stuff means.
sho
Check this out:
http://www.labtestsonline.org/understanding/analytes/mma/test.html
Erin,
I don't know the answer to this question, but I will bump it up to the top, so hopefully someone with more knowledge about blood work can see this and answer it.
Heather