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A member asked:

What can cause high active (holotranscobalamin) b12 levels in blood, when red & white cell & platelet counts, liver & kidney function are all normal?

A doctor has provided 1 answer

It's just you: This test itself is not mainstream. It is experimental. A high value on a B12 is never a clinical concern. Reference ranges at real labs are set so that a few percent of healthy folks fall outside on either end.

Answered 5/15/2018

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I just got a blood test back with B12 @ 2843 I am not supplementing with anything and eat well. My kidney/liver tests were normal. What could this be?

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My B12 levels were high in my bloodwork, kidney function looked good, liver enzymes looked good, no anemia, what could cause this? Thanks

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