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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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