Senior Member
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Join Date: Jul 2012
Posts: 1,027
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Senior Member
Join Date: Jul 2012
Posts: 1,027
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Brian I agree. That is sorta what I meant by active and inactive B12. A serum blood test only shows the total amount in the body, which includes all the INACTIVE.
They have a test that measures only active B12 but I have not had it done.
I think I remember you need to stop 2 weeks before testing but I don't know for sure. I take the sublingual tabs.
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