What are proper levels of vitamin B12 for a 63 yr. old women?

by Carolyn Deal
(Jonesboro, AR. USA)

I recently began having pain/soreness in my tongue, burning

in my mouth and pain in my teeth. My dentist said she had
seen these symptoms hundreds of times. She said it is a B12
deficiency. I made an appointment with my family dr. who said he would do blood work. This came back "within range" at 644; the range being from 239 to 931.
Beside the fact that the test could have been the wrong one--not the Methylmalonic Acid test--I would think anyone would need to be in the 800-900 range. I have also been experiencing forgetful patterns, extreme tiredness, aching in joints.
My thyroid is hypo, which I don't think has been treated
correctly, which causes me problems.
I do appreciate your time in reading my message.
Thank you,


C. Deal