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A member asked:
What is the most accurate blood test to check for b-12 deficiency?
A doctor has provided 1 answer
Serum B12 level: Blood levels of vitamin B 12 are routinely tested by most hospital labs and it is a good test. See this site for more info on the topic. http://www.nlm.nih.gov/medlineplus/ency/article/003705.htm
Answered 12/4/2014
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