Kathie, They do a specific vitamin B12 level. No, it's not normally in a CBC but can be in an anemia profile (not always). Do you have symptoms of a deficiency?

The range for "normal" B12 can vary from lab to lab. Even if you have a value in the normal range, if you have symptoms, you might not be getting enough B12 to your tissues. A certain amount is stored in our liver. When the B12 level starts to drop, that means nothing is left for the liver to give you. Someone I know had levels in the 300's with symptoms and they went away after having sublingual methylcobalamin for a few months. It can take as long to recover from a deficiency as you've had it.

Also, my homocysteine was elevated during my B12 deficiency. That and methylmalonic acid can be elevated during one.

Does that answer any questions that you have?

Annie