How to Interpret the Results

Normal vitamin B12 levels range from 160 to 950 pg/mL.

Values within this range indicate sufficient vitamin B12 to support bodily functions.

Potential Risks

The risks associated with a vitamin B12 blood test are minimal.

Doctor preparing man for blood test

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What About Home Tests?

At-home test kits for vitamin B12 are available and often involve collecting a urine sample.

There are two types of urine MMA tests: a 24-hour test and a random test.

Home tests can be a good starting point but should not replace clinical evaluation.

While at-home test kits offer convenience, professional blood tests remain the gold standard for accuracy and comprehensive evaluation.

If your results are abnormal, work with your healthcare provider to determine the best course of action.

Medline Plus.Vitamin B12 level.

National Institutes of Health.Vitamin B12.

Medline Plus.Methylmalonic acid (MMA) test.

UCSF Health.Vitamin B12 level.

Medline Plus.Fasting for a blood test.

Wu HHL, Wang AYM.Vitamin B12 and chronic kidney disease.

In:Vitamins and Hormones.

Elsevier; 2022:325-353. doi:10.1016/bs.vh.2022.01.011

Medline Plus.Polycythemia vera.

2016;11(1):e0147843.

doi:10.1371/journal.pone.0147843

Familydoctor.org.Vitamin B12 deficiency: recognition and management.