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A member asked:

Is 420.8 pg/ml of vitamin b12 low in blood ? does this need a supplement ?

A doctor has provided 1 answer

Normal: Normal ranges of vitb12 =200-600pg/ml. . Therefore you don't need to supplement it. However, taking extra B12 does no harm as the body excretes what is not needed.

Answered 10/26/2016

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