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153-655 pmol/L
Clinically significant B12 deficiency
may occur with B12 levels in the normal
range, particularly in elderly patients.

any hematologist around?
as a 70+ person, what number should i aim for?

thanks all

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replied May 14th, 2018
Diabetes Answer A63837
If there are no symptoms associated with B 12 deficiency then you need not worry. Normal ranges are 200-900 pg/mL. Less than 200 means there is a deficiency and above 900 means supplementation is in process. There is excess of B 12 symptoms documented so far.

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